You guys have convinced me to upgrade from my Athena AS-F2, AS-C1, AS-R1s to Ascends!

I am on a budget, however, so I'm going for a used Classic CMT-340C for center and used HTM-200s for rears (or possibly used classic 170s).

For mains, used 340 classics and new 170SEs are around the same price so those are my choices. Which would you choose?

I almost solely use my setup for home theater. My room is large with high ceilings.