If you don't like aggressive P than the gzr probably isn't for you. The gzr is like a CS 62 on steroids.
The QP and Thumper are two different sounding pups, the QP is modern, whereas the thumper is more hot vintage.
If you like low mids, and like the CS 62, than the Vintage 63 would be the one. 63 has more low mids than the 62.