Time for a new tower, GS I need thy help!

So long story short, house got struck by lightening and basically fried the crap outta my comp. Ive come here looking for help on building my next pc. Now heres the catch though, the ONLY pc games i ever play are tf2, garys mod and counter strike (maybe portal 2 probably not though). Running these games on max would be my ideal goal. My last rig had no problem (duel core 2.1ghz, radeon 4650, 2 gigs of ram) that alone was enough for me lol. So where to start lol. What do you guys think? I have a sleek 24 inch LED moniter so the display is already take care of, just need a tower. As well, I do most of my shopping at newegg but i also use london.kijiji.ca (its like a local ebay minus shipping lol) so if you guys find anything there please post. What do you guys suggest? In terms of budget, id rather not go over 400.00 Remember, im mainly looking to run tf2 on max.

400...what? Currency is useful ;)

You will notice a difference. The HD 4670 is around 20% - 25% better than the HD 4650. The HD 5670 is around 20% - 25% better than the HD 467004dcarraher

Ok Well if you a better gpu your going to need a better psu too so

http://www.directcanada.com/products/?sku=15180BD6108&vpn=HD577AZNFC&manufacture=XFX AMD 5770

http://www.directcanada.com/products/?sku=11130AC0700&vpn=RC-912-KKN1&manufacture=COOLERMASTERHAF 912

http://www.directcanada.com/products/?sku=13220AC3355&vpn=OCZ550FTY&manufacture=OCZ 550w psu

Ok Well if you a better gpu your going to need a better psu too so

http://www.directcanada.com/products/?sku=15180BD6108&vpn=HD577AZNFC&manufacture=XFX AMD 5770

http://www.directcanada.com/products/?sku=11130AC0700&vpn=RC-912-KKN1&manufacture=COOLERMASTERHAF 912

http://www.directcanada.com/products/?sku=13220AC3355&vpn=OCZ550FTY&manufacture=OCZ 550w psu

04dcarraher

for 10 dollars less @ newegg you can get a 5830... (with a free tv-tuner(a 50 dollar value))

http://www.newegg.ca/Product/Product.aspx?Item=N82E16814102878&cm_re=hd_5830-_-14-102-878-_-Product