I see that Jack is making a new reply, so he may have beaten me to the punch, but I have 1c to throw in (not sure if it is even 2c) ...
Given that you have 22s up front, I'm thinking there will not be a big upgrade in terms of HT sound by going with the 60s, so that would be the option I would least recommend. With a good sub set to a relatively mid/high crossover level (80 Hz and up), I don't think the 60s will offer you any improvement. You've already got the fronts covered in terms of Axiom sound.
Now, I have never heard those rears or that sub that you have, so I have no idea how they stack up against the Axiom products. If your sub is not self-amplified, I'd say go for an EP500 or 600.
What is your budget?
