IMO;
For stability , game IQ quality and some performance I'd recommend DH's ZeroPoint drivers (more current than Omega), but keep in mind still stuck in the 67.xx generation (Omega's 61.77);
<A HREF="http://www.dhzeropoint.net/" target="_new">http://www.dhzeropoint.net/</A>
for Raw power (what's IQ?) then DNA drivers would be my recommendation, keeps even more current than DH (71.80), but is mainly interested in speed not quality;
<A HREF="http://www.dna-drivers.com/list.php?c=files" target="_new">http://www.dna-drivers.com/list.php?c=files</A>
For speed AND IQ, as well as probably the MOST up to date tweaked drivers, XtremeG drivers;
<A HREF="http://downloads.guru3d.com/download.php?det=1002" target="_new">http://downloads.guru3d.com/download.php?det=1002</A>
They're relatively new, but I've read good things (haven't tested them like the others)
And then there's always the plain reference nV beta 75.90s SC metioned (currently on my laptop);
<A HREF="http://downloads.guru3d.com/download.php?det=999" target="_new">http://downloads.guru3d.com/download.php?det=999</A>
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