Xevan do NOT get a 500$ video card. If you do I swear you will regret it for the rest of your life. Get a 8800GT instead which is around 200$~ and make sure its a nice brand such as E-VGA. There are A LOT of nice brands, but trust me paying over 250$ for a graphics card is never worth it. Besides a 8800GT will tear WarHammer a new one. If you need a graphics card to play Online Games. You probably don't need one thats over 200$ even a nice 100$ graphics card will handle the job.
so if i put in a 8800gt, say... today, will my current power supply handle it
im pretty sure cause 8800 is the most common card used by most people