Building A Gaming Pc For World Of Warcraft, Any Advice?

I wanted to build a gaming PC since all the new stuff grinds my system to a hault. The only game I currently play that I would prefer better preformance on is World of Warcraft. I'd like to wall the settings out on that and still get good frame rates and little lag and connection issues. Any hints beyond spending two grand on a video card? How about NIC card specs? What else would help my game? The more detailed the info the better.
PS- I'll Buy Propecia probably pick up a copy of Unreal Tournament III once I've got the system for it, so let's go for both.

US Auctions Australian Auctions Austrian Auctions Belgian Auctions Canadian Auctions French Auctions German Auctions Indian Auctions Irish Auctions Italian Auctions Dutch Auctions Polish Auctions Spanish Auctions Swiss Auctions UK Auctions

Best Match Time: ending soonest Time: newly listed Price: lowest first Price: highest first Price + Shipping: lowest first Price + Shipping: highest first

World of Warcraft loot cards Landros Lil XT and Paint Bomb unscratched    US $4.69

UNSCRATCHED WoW TCG TWILIGHT Loot 1 3 Nightsaber Cub WORLD OF WARCRAFT    US $3.45

World of Warcraft Papa Hummels Old Fashioned Pet Biscuit Loot Card    US $1.50

World Of Warcraft WOW Green Kwurky Murloc    US $44.00

Landros Gift World of Warcraft Loot Card Guaranteed Unscratched    US $19.50

World of Warcraft Wrath of the Lich King Collectors Edition Brand New    US $149.99