My first computer build, help?

[noxxten]

I decided I would build a budget PC, I built my setup on Newegg, and i'm kinda sure everything works together. Only thing i'm worried about is compatibility and conflict from parts. My target budget is around $450 - $600ish when everything is all said and done. Heres the setup:

Parts:
Hec HP485D 485W ATX12V Power Supply
Rosewill R222-P-BK Black Steel ATX Mid Tower Case
HITACHI Deskstar 320GB 7200 RPM SATA 3.0Gb/s HDD
G.SKILL 2GB 240-Pin DDR2 SDRAM DDR2 800 RAM
Foxconn P45A-S LGA 775 Intel P45 ATX Intel Mobo
Intel Core 2 Duo E8400 Wolfdale 3.0GHz LGA 775 65W Dual-Core
(I plan on reusing an old cd/dvd drive of a friends)

Links, same order:
http://www.newegg.com/Product/Product.aspx?item=N82E16817339020
http://www.newegg.com/Product/Product.aspx?item=N82E16811147095
http://www.newegg.com/Product/Product.aspx?item=N82E16822145129
http://www.newegg.com/Product/Product.aspx?item=N82E16820231203
http://www.newegg.com/Product/Product.aspx?item=N82E16813186148
http://www.newegg.com/Product/Product.aspx?item=N82E16819115037

About a month or two from now I plan on adding a few more sticks of the same ram(already got 64-bit OS), and the GPU below:

http://www.newegg.com/Product/Product.aspx?Item=N82E16814121242

So will everything work? Also, the case design says i won't need standoff screws. I've always been told the mobo should never touch the case, so what about that? Any help is very greatly appreciated guys :D.

[white]

Personally I would skip getting more ram than 2 gigs and instead spend the money on a name brand power supply. Everything else looks fine, though.