Audio Horizons TP 2.0 Preamplifier

I am still in love with my AH 2.0 but am getting the itch to upgrade my amp, currently Aragon 8008BB dual mono 200 watt per with 26 watt class A. Has anyone been talking recently to AH about whether they are going to build an amp?
I am driving speakers biwired that are 92db and 8ohm top and 4ohm load bottom. I am considering Pass Labs XA60.5 or XA100.5 or INT 150 integrated. Do you think the 60 will be powerful enough, it is all class A doubling into 4 ohm. Anyone have comments on this or others to consider. I have never had monoblocks. Are they really that much better than a quality single box unit?
Thanks for your input.

Tvad
Thanks for the perfectly tailored to my situation answer. Followup questions, if I may, that you can answer privately or on this thread. How do you like and how would you describe the 60.5 sound? Did you audition the XA100.5's and see any differences? I have heard the XA100.5's and they seems fabulous but are over my comfort zone in price.
Joe

I just installed a pair of new Claritycap MR caps in my TP 2.0n preamp. So far, they only have about 24 hours on them, but I think these might just raise this already great-sounding preamp to another plateau. Stay tuned.