If he's switching an 9800 to an 1600, I don't think a 1950 is in his budget
Me, I'm in a similar situation, stuck with agp for now; will upgrade to C2D sometime
next year. Just look at the vga charts here and elsewhere and you'll see that
1600 < 6600GT < 7600GS < 7600GT < 800GTO is the usual order.
I'm thinking of a 7600GS, and from those, Galaxy makes very good ones (Zalman
cooling and higher-speed GDDR3 memory upgrades
). However, depending
on where you live, an x800 might not be much more.
These would be a difference you'd see. The 1600 is crippled imo, and therefore
weak, so not worth buying.