The Emotiva has been getting some rave reviews. Listen if you can.
Of the others, I'd recommend:
NAD
Outlaw
Pioneer ELITE series
The amp sections in these, IMO, are much gutsier and closer to actual ratings with some real headroom in them than the Denon, Yamaha, etc. If you can afford the Arcam, that would definitely be worth a listen also.
The amp section may not be as big a deal with the ST's as I understand they're a pretty benign load to drive. I just know on some tougher loads, there was a definite distinction in performance.
One other option that some of my customers opt for - get a small reciever with the features that you want and then get an external amplifier. Gives lots of guts now and you can easily replace the less expensive receiver in a couple years when a new standard for processing, connectors, etc. comes out without having to respend on the big amp.
Bryan