The thread seems a tad side tracked. And I have posted similar thoughts before. But I have owned very high end speakers (Wilson, Genesis, Martin Logan etc) so what the heck.
I now have a kind of variation of the Linkwitz Orions, which are by most opinions pretty good. I think they are obviously better than my Wilsons, Genesis, M-L etc. Actually, I think they are the best I've heard except the maximum volume Wilson/Alon/Pipedreams.
I started, silly me, the very long Krell thread at AVS as a bit of a gag. But then I bought a couple of the XRs to play against my current very large amps. My speakers are 3 way active dipoles, with 2 way active fronts and rears. My old amps were Fosgate 4200s which I thought (and think) were the biggest bargain in audio, selling for $4K new and $1.2K used for the 8 channels I need. Great amps.
The Pannies are as good through my very revealing speakers. If you are a tubie, especially a SE tubie you mightn't like 'em as much. But having owned amps costing from $8K plus - I use to use Rowland monos, plus Quicksilvers, AR etc - I cannot see that these silly little things will be a weak link.
I'll save amp money, cable money etc and fix my room, do EQ, fiddle with subs more etc. I'd suggest you do the same.
If I could find a digital crossover/EQ with digital ins and outs, and feed that to the Pannies then straight to the speakers.... hard to beat.
Ooops... drinkin' talk... but true.
Steve