I second ThrommArcadia, plus the vast render speed improvement in P7 over P5 and P6.

I did some render speed tests of P7 vs P6, posted the results in another thread:

www.renderosity.com/mod/forumpro/showthread.php

When rendering with Ambient Occlusion and Ray Tracing, P7's render speed is TWELVE times faster than P6's!

However, I like the P6 and P7 face room features a lot, that combined with the P6 James and Miki base characters make P6 (and now P7) a worthwhile upgrade from P5.

I found P6 James and Miki have the best capacities for realistic expressions.

A couple of examples (base on P6 James):

and 

30 minute work in the P6 Face Room, no postwork.

.