Check this build please.

What are you using this build for and why are you getting a GTX260 and an 850 watt PSU? On that budget you either dont need to spend anywhere near that much or you should buy an i7. And may i ask, why in gods name would you think to spend 1900 on a build and only 110 on the monitor and only get a 19"? Get one running 1920x1200 like this asus.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

unless you run adobe CS4 or lots of VM's thers no point in 8 gig of ram , and if you do run CS4 you'd be better off with an i7

the velociraptor is only marginally faster than a wd blacjk hard drive so its an expensive way to cut 3 seconds off your boot time , and wont give you any other advantages.

you wont need a sound card . Onboard sound is great these days

spend more on a better gfx card [ a 4890 ? ]and a decent monitor . 24 inch 1080p models are cheap now

$130 for a mouse?

Holy crap, i didnt even notice that he spent twice as much on the mouse and keyboard as the monitor, i always write those off as ~50 for both, didnt realize they were significant this time around. This build definitely needs a rebuild, post your uses, im sure we can knock atleast 200 off the price.

I picked parts that would last a long time. I like amd and haven't tried intel before, but I want a computer that won't go out of date fast. I would like to keep the ram, processor, and motherboard the same. I will knock the sound card off and I want the mouse and keyboard. What do you recommend for the drives and power supply and video card? I want a modular power supply and a boot drive and media drive and a good graphics card. Please try to reduce the price.

^ The Antec 1200 is good but the P193 and HAF 9x2 are better.

a $130 mouse? Seriously? and it's from Razer, who aren't exactly known for Great quality standards.

if you want a wireless gaming mouse then the Microsoft X8 is a lot cheaper and is one of the best gaming mice on the market.

for a Keyboard, I'd look into any Logitech or the Microsoft X6

You DON'T need a Sound card, onboard sound of today is just as good as discrete cards, unless you have an amazing speaker system.

for a build on this kind of budget for gaming, the 4890 is the lowest card you want.

Get a Samsung F3 1TB drive instead of the Green drive (faster because it uses two 500GB platters instead of the usual three 333GB), or if you want to burn some cash then get one of the new WDC Blue 2.5" 1TB drives and a mounting kit as these will be a bit quieter.

a VRaptor? pay the extra $45 for an Intel 'Silver' 80GB SSD, this will be an awful, awful lot quicker.

switch this ram for 3x2GB of 1600MHz, because you need to swap that mobo to an Asrock X58 Extreme, and instead of the 955BE, get an i7 920. (see if you can get one for $200 in-store if you have a local Microcenter.)

There are some definite improvements that can be made in your build. To start off with, using an Nvidia GPU with a 790FX motherboard doesn't make any sense because that board supports crossfire (ATI GPU's), not SLI (Nvidia GPU's). Here's some suggestions on the components you wanted input on:

HIS H489F1GP Radeon HD 4890 1GB 256-bit PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $179.99

Western Digital Caviar Black WD6401AALS 640GB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive - OEM
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $74.99 (system drive)

Western Digital Caviar Black WD1001FALS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drives - OEM
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $94.99 (storage drive)

I'm guessing you'll want to leave the option open for crossfire, so you'll want at least a 750W PSU. Here's a great modular 750W PSU:

CORSAIR CMPSU-750HX 750W ATX12V 2.3 / EPS12V 2.91 SLI Ready CrossFire Ready 80 PLUS SILVER Certified Modular Active PFC Power Supply - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $164.99

I really don't trust MSI motherboards. I would try to get a Gigabyte or Asus board like one of these:

GIGABYTE GA-MA790FXT-UD5P AM3 DDR3 AMD 790FX ATX AMD Motherboard - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $179.99

ASUS M4A79T Deluxe AM3 DDR3 AMD 790FX ATX AMD Motherboard - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $189.99

I, personally, don't think you need a 790FX board. I would save some money and pick up something like this:

GIGABYTE GA-MA790XT-UD4P AM3 DDR3 AMD 790X ATX AMD Motherboard - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $129.99 - $15 MIR

You can also get faster CAS 7 RAM for the same price as the CAS 8 kit you picked.

OCZ Platinum 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop Memory Model OCZ3P16004GK - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $75.99

I agree with going with a nice monitor like the one posted above. I'll post it again for convenience:

ASUS VW266H Black 25.5" 2ms(GTG) HDMI Widescreen LCD Monitor 300 cd/m2 1000:1 (ASCR 20000:1) Built in Speakers w/ component connector - Retail
http://www.newegg.com/Product/Product.aspx?Item=N82E168... $329.99 - $30 MIR