Help - Best Adcom HT Amp Wiring to HTM2 ?

I recently purchased an Adcom GFA6000 amp with Ace615 line conditioner.
The 6000 is primarily designed for home theater with three (L+C+R) 100w and two (L+R surr) amp sections.

I already have an Adcom GFA555II driving my main L+R channels so the 6000 is purely for my HT speakers.

My question is, given that the center channel is the most important in a HT setup, I'm reserving the most wattage and best use of the GFA6000 to drive my B&W HTM2 which has a (relatively) low 88db sensitivity rating at 120w max.

Note that each amp in the 6000 has discreet variable output controls.

Possible configs
1 100w (using jumpers)
Bi-amp configs
2 100w
1 100w to bass mid + 1 60w to nautilus
1 60w to bass mid + 1 60w to nautilus

Also, please comment on bi-wiring these possible configs. I'm using all 15' 10guage OFC (can't afford much else at that length).

Also what is your honest opinion of this amp for driving the HTM2 - lesser or adequate quality power? Sub $1k upgrade recommendations. (note I only have space for a single HT amp).

Thanks for any suggestions or advice.
Sincerely, Mark.