PC Upgrade

[Omgabear]

Hey!

I'm looking for advice about how to upgrade my PC. At the moment, i'm raiding 10 man, but, last night i had to swap out since i lagged too much.
This has been going on for a while and i want to fix it! Best bet, was upgrading my PC since it is already 7 years old.
Do note, i had a perfectly good internet connection, just in WoW i had really high MS and thus huge lag issues. Playing on low settings! Tried anything that the WoW officials suggest but saw no good improvement. Perhaps, my high MS issue is because of my Gigaset USB Adapter 108 from Siemens.


That thing ^^.


The system i am currently using:
Windows XP Home Edition 5.1 (build 2600)
Cooler Master Case Centurion 534 Black ( no power supply)
Power supply: OCZ Power supply Modstream 520 Watt, silver, blue leds, 24-pins
Processor:GigaByte Motherboard GA-965P-S3, Intel(R)Core(TM) 2 CPU 6300 @ 1,86 GHz (2 CPUs)
Memory: Kingston HyperX Dual Channel 2048 MB, PC6400, 800MHz, 5, Kit of 2
Video card: NVIDIA Geforce 7950 GT 512 MB (1440 x 900 (32bit) (60 Hz))
GigaByte Motherboard GA-965P-S3
Using the Gigaset USB adapter for Wireless internet.

I am looking for an upgrade, to run WoW decently(medium/good quality). My power supply and Fan are working fine, not thinking about upgrading those. But mainly looking for an upgrade for my Motherboard/ graphic card, and a wireless internet card.

Could you please help me find an upgrade that would fit in my current system and improves my gameplay? My budget is mediocre, not willing to spend a whole lot but certainly what is nesscesary. Perhaps something in the range of 200-400 euro.

Thank you in advance!

[ebah]

http://www.newegg.com/Product/Produc...82E16819115077 Processor
http://www.newegg.com/Product/Produc...82E16814161384 GPU
http://www.newegg.com/Product/Produc...82E16813157254 Motherboard
http://www.newegg.com/Product/Produc...82E16820145220 RAM
http://www.newegg.com/Product/Produc...82E16822148767 Hard drive
= 427$ And it will run wow ultra (not 25man raids tho).
Also it will be 92$ cheaper for you, if u can get your old hard drive from your old comp.

[Omgabear]

Cheers!
Thank you for the reply!
Still, isn't the USB adapter bad for wireless? Should i consider upgrading that?
Also, do all the parts listed, work with each other?
Once again thank you.