im going with a pretty sweet deal on an ati x850xt for 119 and a $20 rebate. I was origionally going with an x1900gt for 199, but i needed to make some budget cuts. I have only 300 dollars more to build with than you, and i have an entire computer(monitor and 0s included) to build. if you want a link to my video card here it is. It's 256mb 256 bit ddr3, so it's a good bang for the buck. No core/memclock speeds are listed on new egg, but most overclocked it to around 575/600, so im guessing it's 500/500 stock.
don't buy it before tomorow, if it goes out of stock again i have to find something else...