The other thread about the "new amp is making me grin from ear to ear..." is really, really long. I posted there quite a few times.
here's the jist from me. I had the halo amp (the big one) and sold it when I got a blue Ice amp from ebay. They are very similar to the crown amps.
Once I auditioned the blue ice compared to my Halo ($4k) amp (blue ice was $340), I couldn't believe it. This blue ice "pro" amp was as good in home theater on my setup using martin logan's all around as the halo.
So, I bought 3 Crown amps. 2 x 602 and 1 x 402. They sound as good if not better than the blue Ice, BUT, they have VERY LOUD FANS running all the time. If you can keep the amps in a closet or somewhere where you can't hear them, no problem - they are excellent. However, if you have your amps in a rack 15 ft away or closer to you, you WILL hear them, there's no way around it.
Great amps. They simply don't look very good, and they are loud. But in my case, i can hide them. You would NEVER KNOW the difference between them and the $4K amp in the Halo by Parasound. That, is the bottom line.
I sold the Halo, bought 4 amps, have over 3000watts, and couldn't be happier!