I would suggest without any hesitation the Monolith 7. It has amazing specs. It's a beast and it weighs over 90 lbs.
However, before you commit to its purchase, I strongly suggest that you ascertain that the pre-out voltage from your receiver is high enough, to drive the required input voltage of 1.6v for the Monolith to attain its power ratings. You should be able to get this info by contacting Pioneer.