6600 is pci-e only, and i dont think it will make it to agp
there are not many good "current generation" cards around $150, and I do think 9800pro is at least as good as a 6600 non-GT, since the non GT only has 2/3 the power of GT at best. 9800pro is better than 5900U too, though not by much.
If u can punk the 5900U from work, then may as well wait for the 6600GT or 6800 to drop in price
Oh btw, 9200 is DX8 card, not really next gen, just a cheap version of 9000 which is a cheap version of 8500, and yes its BAD
http://www.anandtech.com/video...oc.aspx?i=2195&p=6