I would get the eVGA 7800GTX 512MB if i were you, and a dual core defintely, Opty 165 or 170 and OC it. That water cooling is a piece of junk. You shuold build a custom built one on DD or pick out some parts on other websites.
You shuold get teh Saitek eclipse keyboard or the G15 adn the G5 or copperhead mouse. Maybe a decent mousepad to go with it
You should get the z-5500 speakers from logitech
You can defintely do better with the monitor. the viewsonic 19" 2MS LCD monitor for 500 on newegg.
i dunno maybe you can give me a couple of dollars here