Advice on component upgrades

APPROXIMATE PURCHASE DATE: This week (Hopefully)

BUDGET RANGE: <$500.00 CAD

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: World of Warcraft, Diablo 3 (when released) and surfing the internet.

PARTS NOT REQUIRED: keyboard, mouse, monitor, speakers, OS (WIN XP), case (generic), power supply (NSpire NSP-450P4LF12), DVD drive and hard drive.

PREFERRED WEBSITE(S) FOR PARTS: newegg.ca, ncix.ca

PARTS PREFERENCES: no preference.

OVERCLOCKING: No

SLI OR CROSSFIRE: No

MONITOR RESOLUTION: 1280x1024

ADDITIONAL COMMENTS: I am currently using an OLD AMD Athlon 3200+ with 1 GB RAM and an ATI x700 PRO (AGP) video card. This PC is 5 years old and I am hoping to upgrade the major components relatively cheaply so that I can play WoW and D3 as well as general web surfing and flash online games (for the younger kids). I would like to get a PC that will last another 4 or 5 years knowing that at most I play Wow and D3 when released.

The power supply that I have is 450w with 32A total on the 12V rails, here is a link. I need to upgrade the CPU, motherboard, video card and RAM. I am on a pretty tight budget and it's been a long time since I have investigated PC upgrades so any help that could be provided would be much appreciated.

Thanks in advance.

I agree with helloworld about the PSU. Check this build out, it comes to about $500 before MIRs.

AMD Phenom II X3 720 2.8GHz 3 x 512KB L2 Cache 6MB L3 Cache Socket AM3 95W Triple-Core Black
http://www.newegg.com/Product/Prod [...] 6819103649

GIGABYTE GA-MA770T-UD3P AM3 AMD 770 ATX AMD
http://www.newegg.com/Product/Prod [...] 6813128392

OCZ Flex EX 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Enhanced Bandwidth Desktop
http://www.newegg.com/Product/Prod [...] 6820227404

XFX HD-485X-YDFC Radeon HD 4850 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported
http://www.newegg.com/Product/Prod [...] 6814150337

OCZ ModXStream Pro OCZ500MXSP 500W ATX12V V2.2 / EPS12V SLI Certified CrossFire Ready 80 PLUS Certified Modular Active PFC
http://www.newegg.com/Product/Prod [...] 6817341016

Antec Three Hundred Black Steel ATX Mid Tower
http://www.newegg.com/Product/Prod [...] 6811129042

Good point, failed to notice the .ca

Here's a list of a CPU, motherboard, RAM and a graphic card.

CPU - AMD PhenomII x3 710 $118 - alternate would be the x3 720
http://www.newegg.ca/Product/Produ [...] 6819103648

Motherboard - MSI AM3 770 - $90 uses DDR3 RAM, has PATA supports 2 - IDE devices.
http://www.newegg.ca/Product/Produ [...] 6813130228

RAM - 2x1 GB DDR3 1333 7-7-7-18 $49 Since you're running XP32bit you'll be fine with 2GB. If you upgrade in the future to Vista or Win7 64 bit add 2x2 GB kit.
http://www.newegg.ca/Product/Produ [...] 6820231178

Graphic card - BFG GTS 250 1GB - $149
http://www.newegg.ca/Product/Produ [...] 6814143191

under $410 total price not counting shipping.

WoW benchmarks - notice the GTS 250
http://www.pcgameshardware.com/aid [...] /Practice/

http://www.xbitlabs.com/articles/v [...] html#sect0

I don't like NSpire power supplies, they get very few, if any good reviews. You may want to change it out if you can afford it, but if it's been trouble free for you till now i doubt if it's going to cause problems.