Am I thinking straight? MC255 vs 152 and 301

[MrG]

I would really appreciate your input, thoughts and suggestions.
I am planning on replacing two of the amplifiers in a multi amp system. They are both solid state, one a monobloc and the other stereo.
The monobloc is connected to an active crossover on one end and a large horn loaded subwoofer on the other.
The stereo amp is fed by a different active crossover and is connected to the 15in bass drivers of the "satellite" speakers.
The sub is crossed over at 80Hz and the satellites at 450Hz.

Looking over the McIntosh offerings I was considering the MC152 as the stereo amp and the MC301 to replace the mono. But...………. What to my wandering eyes did appear?...…….
THE MC255...…… I am thinking:

I am only using these amps for the lower registers - Should be a strong suit for the 255
The center channel can be connected to the sub. 250 wpc is plenty of power
As you know balancing the output of the drivers is critical and the crossover feeding the amp has a variable control, so I am good there.
The left and right pose a bit of a different problem as the current amp has both volume and L to R balance which simplifies the adjustments. However my mid-high frequency reference amps have gain controls. I think I can easily change my procedure by setting the bass levels first, then bringing in the sub and finally the mids and hi's. ( I use a sound generator, calibrated mic's and a real time analyzer )

By my way of thinking the MC255 would actually be a better choice in this application.
Thoughts???
G