Overclocking does come to mind here,
Especially if you have a Thoroughbred B processor. One of my friends has his 2100 Tbred B @ 2700 speeds, just on air cooling.
If you have decent air cooling u can reach good overclocks with a Tbred B.
Get a 2100 (and make sure its Tbred B) and overclock!
The way to tell is the following:
1)First thing to do is to see if it's a genneral Thoroughbred (A or B). This is easily done! The older Palomino's have the CPU info on the actual die itself, whereas the TBreds have the info on a black sticker.
2)you can see the code through the packaging (you may need a magnafying glass tho).
The only way to tell between the revisions is the 5 letter code on the last line of the black sticker.
one with the 5th letter ending with an A is a Tbred A (eg AIUGA)
one with the 5th letter ending with an B is a Tbred B (eg AIUGB)
Go for any of the CPU's with the "B" stepping!