Responses from secretguy

Magnepan 3.6R
You should be good....similar to a room I used IIIs in...although I did think they'd benefit from a larger space. They sounded great though. 
Best movie to see what your HT AUDIO will do.
Apollo 13. It has scenes that will test your system both for bombastic sound and subtlety. Plus it's a wonderful film. 
Used turntable market
Add me to the list of folks that had TTs arrive damaged. I won't have a TT shipped anymore, except from a dealer in factory packaging. 
New Magneplanar 1.7 owner
I'm curious about how you have the sub set up. I've never gotten a sub to sound right with Maggies. Are you using an external Xover? Or does your amp provide bass management? Thanks. 
Record clamps: do they really make a difference.
No. No. No. 
Advice for new Integrated amp please.
I have the Anthem 225 driving my 4 ohm Maggies. It drives them effortlessly. 
Best speakers for $1500 or less?
Monitor Audio RX6 
Phonostage with dual inputs?
Boofer...I have the 640, which does support LOMC. I run a Denon 301 II through it. I would assume the newer 651 does as well. 
Phonostage with dual inputs?
Challenge: Best $2K-ish floorstander
I have the 1.7s. I think you made the right choice. They just do everything well. Good luck! 
What cartridge do I get now?
I can't recommend the Denon 301 II highly enough. IMO, nothing comes close at anywhere near the price. 
Question for Maggie 1.7 owners
Thanks. I'm going to mess with them. I have serious back issues, so it's easier to ask opinions first. LOL. May insert resisters too just to see. 
What is your cartridge and tracking force used
Denon 301 MkII set at 1.25 grams. That's the lower end of the scale, but it seems to track everything perfectly. 
Speakers that do pianos really well
Here's a weird one...
I emailed the company. They wrote back that it needs to be serviced. Brilliant, eh?