This is exactly what I will be doing in the near future. I bought a switcher to compare my refurbished McIntosh 2105 against my newly acquired Dennis Had tube amp. Should be fun to see the difference.
Throw a pic up would like to see them. I toyed with the same concept (adding an area under them for subs) but I currently use that THTLP in the middle as my sub.
Those amps look promising. I have had several different emotive amps and pre amps and they have all been stellar performers. What will these mono's be driving?
I would give them a shot you can always return them if they don't work out. I can tell you the RP-160's are very close to the RB-75's I had. I would think the 600's would be a touch better than the 160's.
Well it's an unwritten rule that you must post pics upon taking delivery! I almost went with those. Congrats I bet they are going to knock your d*^k in the dirt when you get them dialed in.