help with my first build parts. thanks

okay heres the pparts i've assembled, i wanted to keep the prices down and i already have optical and dvd burners, plus one hard drive but how are these components for gaming? the other parts i am using are comming from my old dell dimension 8400 and these are the other parts i need to make a gaming rig...the total on these parts is $822.93. does anyone have any recomended changes to these parts?

case-Sunbeam Transformer IC-TR-BA Black Steel ATX Full Tower Computer Case

http://www.newegg.com/Product/Product.aspx?Item=N82E16811166004

hdd-Western Digital Caviar SE16 WD2500AAKS 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s Hard Drive

http://www.newegg.com/Product/Product.aspx?Item=N82E16822136161

gpu-ASUS EAH4850/HTDI/512M Radeon HD 4850 512MB 256-bit GDDR3 PCI Express 2.0 x16

http://www.newegg.com/Product/Product.aspx?Item=N82E16814121253

psu-CORSAIR CMPSU-550VX 550W ATX12V V2.2 Power Supply 90

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139004

ram-OCZ SLI-Ready 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory

http://www.newegg.com/Product/Product.aspx?Item=N82E16820227198

mobo-ASUS P5Q Pro LGA 775 Intel P45 ATX Intel Motherboard

http://www.newegg.com/Product/Product.aspx?Item=N82E16813131299

cpu-Intel Core 2 Duo E8400 Wolfdale 3.0GHz 6MB L2 Cache LGA 775 65W Dual-Core Processor

http://www.newegg.com/Product/Product.aspx?Item=N82E16819115037

Nope, sorry.

hah set up is easy and can be done in a couple hours?westvufootball

Yes it's very easy. Here's a guide that will help you. It's a little old but still useful.

And don't forget to have zip ties to tie the cables inside your case for better airflow.