Not sure anyone is interested in total amp overkill, but a Class A Plinius amp managed to do ... ah ... something to the bass of my Merlins. Yeah. I had NO IDEA that 6" drivers could DO that. WOW.
BTW, GIK Acoustics is pretty good stuff. Affordable (by comparison), too.
As for audiophile cabling, yes, Bobby is a big proponent -- and I suppose anyone who's chatted with him knows his preferences for Cardas.
To be perfectly frank, I have had some experience with Merlin speakers and a whole loom of Golden Reference cabling, but was amazed by the difference between them and an all-Acoustic Zen loom. That is, I was amazed I couldn't tell them apart -- even when used with a Filarmonia (don't bother; I expect YMMV). I sold all my Cardas and bought a better DAC.
Stack ranking system system components:
1. Speakers: Merlins are *never* going to sound like Maggies.
2. Amp/Pre: want to maximize your speakers? Get an amp that is "better" (for your speakers).
3. Room Treatments: makes a difference, but whether that's a good change or not is debatable.
4. Source: you need to spend a lot to get very, very little.
5. Power: only relevant if yours is bad. Which it probably (statistically speaking) isn't.
6. Cabling: I firmly believe that this is a religious argument where neither side is grounded in either reality or actual science.
7. Tweaks (footers, racks, &c): Here Be Dragons.