We have been very happy with our 7700 PQ. Neighbors had a 7800 PS which they replaced with a 7810PQ. They were not happy with the PS trans in the 7800. I think if you want a PS, I might lean toward the 4455. If not, then the 77 or 78.

edit:  The A/C on the 7700 certainly does leave a lot to be desired, as does the park setup in the PQ trans.