Seeing as Photoshop CS5 uses minimal hyperthreading, you can choose either the i5-2500k or the i7-2600k.
Also note, the i5-2500k is only the best bang for the buck in the case where you're NOT using any of the hyperthreading capabilities (read: when gaming).
CPU Cooler (optional, but if you're getting a K CPU (which I would suggest, not much price difference), might as well get one.
As for an SSD, it's definitely worth it. The OCZ Vertex 3 120GB is on special this week on NCIX!
I'm not going to recommend a case, because different people have different preferences... Check if it has USB3 on the front panel and adequate airflow, made from a quality brand such as ThermalTake, Corsair, LianLi, Antec or Rosewill, and check for specials!
Also, I will suggest 16GB RAM, as you can actually use it!
CPU: i5-2500k (~220$) or i7-2600k (~325$)
Motherboard: ASUS P8Z68-V LX (~115 with MIR)
CPU Cooler: CoolerMaster Hyper 212 EVO (~30$) and Arctic Silver 5 Thermal Paste (~10$)
SSD: OCZ Vertex 3 120GB (~150$ with MIR on NCIX.com) HDD: Seagate Barracuda 7200.12 500GB SATA III (~95$) just remembered you had a set of RAID5 drives, use them as storage.
GPU: ASUS AMD Radeon HD6770 EAH6770 (90$ with MIR) or try using your old one first!
Optical drive: DVD burner (~20$) interested in BluRay?
RAM: Corsair 16GB 2x8GB CMZ16GX3M2A1600C10 1.5v DDR3-1600MHz (~130$)
PSU: Thermaltake TR2 W0379RU 500W (~40$ with MIR)
Here is a link to my build from last week for very similar purposes. http://secure.newegg.com/WishList/PublicWishDetail.aspx...
I brought the whole thing in for $961. I already had the GTX 560ti GPU.
If you are using Adobe products be sure to get a Nvidia GPU.
Put your OS on the SSD and only your most used software including the editing software. Put the photos and backups on the HDD. The SSD will knock your socks off.
Here is a link to Adobe forums with excellent advise for various budgets for photo editing. http://forums.adobe.com/thread/947698?tstart=0
When you decide what parts to buy go here and fill in all the boxes use max stress for everything. It will tell you how much power is used. Add 15% and buy a PSU at least that size. http://extreme.outervision.com/index.jsp
Search the forums using terms like Adobe, CS5, Lightroom, or whatever you are using. You will find there have been plenty of other posts about this.
Makes sense I suppose, if you're not going to overclock. However, you're limiting your future expansion options. Buy an SSD (make sure they give you the OS disk) and, if the RAM isn't enough, you can always upgrade and add a couple sticks.
I used an i5-2310 on a PC. It's a good processor (it's the same chip as the i5-2500k, but with a locked multiplier and underclocked, see below)
The difference is that an i5-2500k can easily run at 4.0GHz, that's quite a big difference... The problem is that you won't always be able to use this increase in processor frequency. According to Adobe, for Photoshop CS5 on 64-bit Windows,
some features take greater advantage of the additional processing power than others.
Overclocking the sandy bridge in a nutshell:
i5 2310 --> VERY minimal overclocking, let me explain
The frequency you get from a Sandy Bridge CPU is calculated this way
100 MHz x 29 = 2900MHz = 2.9GHz (CPU frequency)
where 100MHz is the base clock and 29 is the multiplier
In an i5-2500k (or any other sandy bridge K model, such as an i7-2600k), you can change the multiplier (the multiplier is unlocked) up to about 57 (I'm not saying you should, but you can!).
In any other Sandy bridge CPU, you can only change the base clock (up to about 107MHz. So, very minimal overclocking...
Also, make sure that Dell rig running 64-bit windows 7.
3 motherboards were recommended from 3 different mfg's
- GIGABYTE GA-Z68X-UD3H-B3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0: $160 (it has the front 2 x USB3.0 connector to go with the case)
ASUS P8Z68-V LX (~115 with MIR)
ASRock Z68 Extreme3 Gen3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard