http://www20.graphics.tomshardware.c...229/index.html
A BIG group test, ranging from the Geforce 4MX, up to the 9800XT and FX5950 Ultra.
Wiunners in a straight shootout...
UT2003 - 9800Pro
BF1942 WW11 - 9800Pro
COD - 9800Pro
Q3TA - 5900XT (an older game, and is this OpenGL?)
WC3 Frozen Throne - 9800Pro (but looks like many topped out at the same level)
C&C Generals - 9800Pro (5900XT a long way down the table, but the results are also more or less flatlining)
Halo - 9800Pro
Nascar 2004 - 9800Pro
X2 Rolling demo - 5900XT
Aquamark 3 - 9800Pro
The 5900XT seems to lag more as the quality is turned up to the max, but is still a creditable card, but unless you have anything against ATI (historically, Nvidia have had better drivers), but if you have the offer of a 9800Pro at under £100, I wouldn't look for anything else.