Mark-
I was actually impressed at how loud I could crank the 3805 in multichannel. It does a pretty good job without getting too warm, but I'd like to toss in an amp to do the brunt of the work.
BTW, what's on your list so far? I'd highly recommend Beck's "Sea Change" and obviously Floyd's "DSOTM." Both are absolutely spectacular and really show off the capabilities of multichannel audio!

I'm eager for more to come out on SACD and DVD-A...like Radiohead, U2, Elbow, Spiritualized, and others that would translate so well in these formats. I guess I'll have to wait.

(not patient)
The Anthem MCA seems like a really good bang-for-the-buck amp, and I figure I'll bite the bullet and get the 5-channel now instead of just amping the fronts and getting the rest later. I don't have enough room for too many components!
Let me know what you end up doing.
Jason