I agree xcache is much faster. I have been running eaccelerator for a little bit and it seemed to do the same reset but not as often. I just switched it back to xcache and the page loading is almost twice as fast.
If it only resets once an hour I can live with that. I will tweak the settings some more over the next couple of days and maybe even try some of the settings that you mentioned.
I did change these settings:
and I still have keep alive set to -1.