Hey Adam, isn't it fun to turn the tables and ask for input/advice once in a while, as it seems you are accustomed to giving it a lot of the time...
Well, I agree with cfrizz. A multi-ch amp is easier, straight to the point, and will be very easy to sell. Emotiva has a great bang-for-buck rep here and elsewhere. I think, though, in my countless hours of forum wanderings, Outlaw might be even more loved. They are
universally loved it seems to me. My NAD T973 isn't exactly a slouch, but I will say when I was looking for amp advice,
everyone invariably was telling me to get the best I could afford (tough speakers). I did my best, but I only sort of barely-slightly wish I got Outlaw's best multi-ch. Its ok, if I get a dedicated room one day, it would have worked out for the best! Outlaw's multi-ch amps don't last a freaking day on the classifieds, Audiogon or elsewhere. (Do Emotiva products also have transferable 5-yr warranty?) (*Oops, I just now see that you are not a "reseller", excuse me....)
Anyways, if you would be hard pressed to find a use for your present amp, other options could include a 3-ch amp (doesn't Anthem make one), or 3 Outlaw monoblocks for the front 3 (Emotiva for rears).
*More innumerable options if only for the pleasure of imagining:
- get 2 more speakers for 7.1(!) and get a 5-ch or 7-ch amp
- 5 monoblocks! lol
- enough amps for height surrounds too! lol
- replace front 3 speakers, use center as a rear, for 6.1!
As entirely pleasurable as it is to spend other people's money, you do say you are getting speakers as well? Why not those first (did you say?). Splurging on the amp is good clean fun, but do you have everything else you want or need already (outside of speakers, of course)?
Yes, after a little moment to ruminate, I say get your new speakers first, and the amp choice will fall into place a bit easier, I would imagine. If only due to remaining budget!
(jk, but seriously, if you x-over'd your present speakers say at 80hz in a normal room, I think most of your options will be fine. Its if you really do get top-notch full-range mains that you might possibly think about best power affordable, imo)...