Replacement for Proac Response 3's

Hello,

My father is looking to replace his aging Proac's with something that both sounds better, and is physically smaller. Another requirement is that they can be placed relatively close to the rear wall...say 18-24 inches, and can fill a pretty large room with sound...the room is 20x20x12...power is not an issue as he has Bryton 7b 500 watt monoblocks.

I suggested Totem Mani-2's as a possibility, any other thoughts. We live in Toronto so it would be helpful if it is a brand we can audition locally.

Thanks

p.s. the current system is:

Proac Response 3's speakers
bryston 7b amp
sonic frontiers line 2 preamp
arcam alpha 9 cd player
oracle delphi mk.5 turntable
assorted cables