9100 is a renamed 8500le
my bro has a 8500le in his duron 1.1ghz setup, runs most games rather well (r63, ut2k3, splinter cell) though not at the max of details. and to be honest, im happy with the 8500le i have in my main rig (though i hope to upgrade to 95/9600 pro sometime this summer)
newegg has the 9100 128 for around 80, seems like a good buy. though, yesterday they had a gf4 4200 for 90, which for 10 dollars more was an even better deal...anyone agree? the 4200 should blow the 9100 out of the water, extra memory aside.
the 9000 isnt quite as good as the 8500le/9100