If budget were not a consideration, I'd get a Moon 5-channel amp and then get a good pre/pro in front of it.
Now that we've got the unattainable out of the way, I'd likely go with something like a Moon integrated to drive the front speakers. It has a HT passthrough, which would allow you to integrate the Moon into a HT system with an AVR (or other pre/pro and amps). As I've never attempted such a hookup, I'm not sure of the cabling requirements etc.
I'd likely get a Moon integrated used (the I5 can be obtained under $1500 used and the I3 can be had for under $1K used) if it can be powerful enough for Forests - you can send an email to Totem to see what they think as they are very familiar with Sim's Moon products. According to Totem's FAQ's, you need 60 watts + for the Forests, and the I5 and I3 have 70 and 100 watts per channel respectively, so it should be sufficient.
Don't get thrown off by those power numbers - the Hawks that I am using sound like they have more headroom and are driven with much more ease than they were with my previous 120-watt Bryston.
Strangely, the cheaper I3 is actually more powerful than the I5, but the I5 sounds a bit better anyways....though perhaps the higher power output of the I3 will be a better match to the bigger Forests?
BTW, Moon integrateds are pretty pricey new, but do come with 10-year warranties that are not valid on used units, FYI...