Fast Photoshop / Web Development under $4k

Hi everybody,
This is my first post here and I need some help. I read the stickys and am doing my best to follow the rules. I am a web developer who mainly does graphics (Photoshop + Flash + text editor coding, but obviously that last one wont take much ). Right now I my Dell is dying on me (don't ever buy one, mine began to turn useless after a year and a half and it was the top of the line workstation they sold with every best option) and I have permission to build a top-notch system ASAP that I can use for roughly the next 3- 4 years. I would like to keep the budget under $4k to allow money to buy new monitors, but if it takes a little bit more to go that extra mile thats ok. I need something that is FAST in terms of both operations and opening large files. I figured I would go a step down from the i7-975 Extreme 3.33ghz to the i7-950 3.06ghz just because I am not looking to simply blow money. I know the motherboard and graphics card is a bit much since I won't be gaming or running 3d apps on it but I would like the ability to have NO LESS than 12gb of RAM and run hi-res dual display and these seem to be the only types capable of handling that amount of memory. I have never started from scratch and don't know much about voltage and things like that so I'm a little reluctant to OC unless its worth it. I just want something VERY FAST that won't blow up or be irrelevant in 2 years and be able to run a lot of RAM. I am not sure how much faster solid state is than traditional hard drives but I picked a SSD just to run the scratch disk in Photoshop. Any tips anyone could give would be useful. I don't want to buy all this stuff and then have it not work together and look like a fool instead of buying a premade piece of junk Dell or HP that I know will be useless in a year. If spending extra $$$ on another solid state to run OS & programs will make a difference then I'll do it. Thanks in advance everyone! PS: Forgot to mention will be running Windows 7 x 64 Professional.

So far I'm only up to ~$2,700 in components:
APPROXIMATE PURCHASE DATE: ASAP
BUDGET RANGE: $3-4.5k
SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: Photoshop, Flash, light After Effects, office stuff(Sql Server, Outlook, Excel, text editor, etc.)
PARTS NOT REQUIRED: Mouse, keyboard, speakers, etc.
PREFERRED WEBSITE(S) FOR PARTS: NewEgg.Com
COUNTRY OF ORIGIN: USA
PARTS PREFERENCES: New Intel i7 processors with tons of RAM that can handle anything
OVERCLOCKING: Only if its safe...
MONITOR RESOLUTION: 1920x1200 primary for graphics work w/ 1280x1024 secondary for coding
ADDITIONAL COMMENTS: I need something that will last about 4 years and still be relevant

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Here is the equipment I've picked out so far on newegg:
PCU:Intel Core i7-950 Bloomfield 3.06GHz 4 x 256KB L2 Cache 8MB L3 Cache LGA 1366 130W Quad-Core Processor - Retail (is stock cooler enough?)
Motherboard:EVGA E760 CLASSIFIED "Overclocker's Pick" 3-Way SLI + PhysX 1366 Intel X58 EATX Intel Motherboard
Power Supply:ABS SL series SL1050 1050W Continuous @50°C ,80 PLUS SILVER Certified,Modular Cable Design,Single 12V Rail,ATX12V v2.3/ EPS12V v2.92,SLI Ready,CrossFire Ready,Active PFC"Compatible with Core i7, i5" Power Supply - Retail
Graphics Card:EVGA 896-P3-1255-AR GeForce GTX 260 Core 216 896MB 448-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card (the Dell laptops my buddies are buying come with EVGA 275s so I figured I'd get something decent in case I want to run some type of game)
RAM:12G - 2 sets of CORSAIR DOMINATOR 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Triple Channel Kit Desktop Memory Model TR3X6G1600C8D - Retail
Primary Storage Drive:Seagate Barracuda 7200.11 ST31500341AS 1.5TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
Photoshop Scratch Disk SSDWestern Digital VelociRaptor WD3000HLFS 300GB 10000 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Driv
Case:Thermaltake SwordM VD5000BNA Black/ Silver Aluminum Extrusion ATX Full Tower Computer Case - Retail

Thanks for your input jbakerlent, I will look up your suggestions. I know I am probably overkilling it, but I just want to make sure it will last. As I said, I am not worried about budget as much as reliability.

^Wow Proximon nice suggestions, I totally agree with you.

To OP: there's no point in buying an expensive CPU, that an i7 920 will do the job. You can overclock it to the i7 975 speed, or higher if you want. This option is much more cheaper. Save the money now, and if you really want to gain performance, next year go buy the 6core i9...I doubt you gain much benefit from it, since you are only doing photoshop..etc

Get the Prolimatech Megahalems heatsink to overclock, it's one of the best

There's not really anything I could add because Proximon's build is remarkable.. so..
I recommend Proximon's build.

^Post an update of your build, if you are considering any of our suggested parts..i updated my above post too.

Will do guys. The only question I have now is, if I do buy 950, will I be able to OC that to outrageous speeds in the future? I don't want to start out overdoing it but I will consider expanding in the future. That was one of my initial thoughts I should have mentioned (sorry I'm a newb). I have to go to bed but I will study all your recommendations thoroughly throughout the week. I'm mainly worried about becoming outdated and if in 2 years I waste x amount of hours working on files that directly correlates to lost $ hourly billing so I have been encouraged to just "get it right". Again, thanks for all the input. You guys are awesome! I hope if I learn anything by putting this system together I can provide some type of help for others. I think this is a pretty wide market segment for people that don't want to use Macs.

The X58 board and quality CPU will ensure you don't become outdated. CPUs are simple to upgrade.

It's much easier to push a less expensive CPU harder, because if you do screw up you aren't out so much money.