What new amp for my Merlins

I asked this question about 6mo ago. A lot of you told me to get the X upgrade first, I did and what a great improvement. So now I ask the same question again.
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For those of you with the Ars, do you have the amp in your rack or on the floor by the speaker's? Exactly how much heat does it put out?
The reason for the delay was that they were in the process of moving their production site. I believe everything is back on line now.

I am interested in the heat issue as well. The amp could go on the top of my 3 shelf rack, but it would be nice to be able to place it below if I switch my source to a top loading cdp.

I run Cary 805 mono blocks in my 15 x 18 x 8 room with absolutely breath taking results. Highly recommended.