sempron is OK, the 3100+ is the amd64 without the 64, the others well.... i have no idea
my advice would be to get a AMD 2400+ mobile. They sell for about 75 on new egg.
I have one with an abit NForce 7. It usually runs at 166 bus with a 11 multiplier, just raise the bus to 200 and you get 3200+ speeds then if you feel like raising voltage and stuff, boost the multiplier.
BTW, the amd mobiles are the same as the bartons, they just run cooler and at lower voltages.