the new SAM460 might have enough power for AGA games too but the main problem is not the lack of power compared to x86 but the fact that older SAM do not have Lvl 2 cache (SAM460 has a (albeit small) Lvl 2 cache) and that e-uae does not have a JIT (winuae does, thats why even low spec x86 could run any game including the most demanding one at full speed).