Are you in the USA?
On a tight budget I recommend the Visiontek Xtasy 5632 32MB, Geforce2 GTS-V (V for value). Basically it's a slower speed version of a GTS but it easily overclocks to the former's speed and higher. Otherwise it's the same card. <A HREF="http://www.newegg.com" target="_new">www.newegg.com</A> is selling it for $52. This card easily performs with (and beyond most) Geforce 2 MX-400's. Check out the <A HREF="http://www.newegg.com/app/viewproduct.asp?description=14-129-007" target="_new">user reviews</A> at that site.
<b>We are all beta testers!</b>