Uh... the OP didn't make it sound like he was buying for a MAME computer, he was buying for his wife.
The chip he was buying isn't being discussed, he already owns the two rebel mentioned.
Oops, you're right. I misread the OP post.
In that case, has anybody done any testing on CPU's with different cache under MAME?
By my rough calculations, an OCed E2160 1MB would be about 12% faster on the cache than E6550. I confess I don't know a lot of key details about the Conroes.
It seems like E2160 is the new 300A so I would go with that. Unless someone knows of any test results with MAME and different cache sizes?