Best amp for Carver Amazing Platinums?

Thanks to all for your perspective and time. I have a set of Carver Amazing Platinums with 60" ribbons, four 12" subs in each speaker, and updated crossovers. I also run a set of Klipsch Cornerhorns in the same room with a different amp. The central preamp for now is a high end Yamaha.

Question: What amp would be best for just the Carvers? I heard them on a Sunfire preamp and the old Carver 200wpc cube amp at a friend's home and they sounded great. I want to improve on that sound if possible, so can anyone venture an opinion as to the best 200-400 watt amp for these speakers? Budget is $1500 or less, and I like used stuff. My living room is 24' by 26' with 10' beamed ceilings.

Should I get one high power amp, or two lower power amps and do bridge or mono? I am told that Parasound 2200.2 or Parasound 3500 is good on bass management, but I am quite ignorant of the best approach. I like a lot of commanding bass and clear vocals with sparkling highs that linger until they fade away....not asking for much am I, lol? As a reference point, I definitely did not like the harsh peaky sound some female vocals made in my old
NAD 7600/NAD 2700THX/Infinity RS-III/Infinity Kappa-8 system which was also too boomy for my ears. Anyway, any opinions? Thanks very much to everyone who helps.