This was a decent amp in its day and will certainly give you significantly more, and more robust, power.
https://www.audiogon.com/listings/lis9dg4c-proceed-amp-3-channel-power-amplifier-amp3-17633-multi-ch...
Personally, I'd also consider upgrading your center speaker to something like this...
https://www.paradigm.com/en/center/premier-500c
Your cc-270 was $279 when new, and trying to push that speaker into a larger room, I just don't see it being optimal. Just a thought.
https://www.audiogon.com/listings/lis9dg4c-proceed-amp-3-channel-power-amplifier-amp3-17633-multi-ch...
Personally, I'd also consider upgrading your center speaker to something like this...
https://www.paradigm.com/en/center/premier-500c
Your cc-270 was $279 when new, and trying to push that speaker into a larger room, I just don't see it being optimal. Just a thought.