I am looking for excuses to spend some of that magical "tax return" money. That said, can I get people's input on receivers between $700 and $1k?

To start things off, maybe thoughts on:
Denon AVR3803
Onkyo TX-NR801
Yamaha RX-V1400
H/K AVR7200

I have m60s, vp150 and qs8s in a 12' x 15' room set up lengthwise (couch at ~10') My sub is an AudioSource SW-15 which is adaquate for home theater, although rather boomy. (I plan to replace it eventually, but the sub is not the point here.) My current receiver is a Kenwood VR-507 and I know it can't really send the power it claims it does to every channel simultaneously. I feel like I'm doing my axioms an injustice. They sound great, but as I turn them up there's a point where I can feel they are pleading for more juice...

[black]-"The further we go and older we grow, the more we know, the less we show."[/black]