Hi Ernie,
I think I'm reading that you like the sound of 211 high power tube amp. Yes, i agree with you the sound is 3D, natural and organic. Though XA30.5 has only 30W class A power, i'm surprised that you could hear more bass weight...maybe SS does offer that bass magic! Or maybe listen to the sound and if possible, compare to 'live' music...determine which one (pass Lab or Dragons) is more accurate.
Everyone has different preference. I've owned Coincident products since 2004 and increasingly more and more, after all these years, i think i can safely say, Coincident makes neutral gears (speakers and amps)...i'm sure there are people out there thinks it's "bland" and prefers more coloured sound, perhaps romantic sound.
I still miss the romantic but highly coloured 300B sound...so the Franks though neutral and un-coloured, plays all music accurately. Unlike some romantic 300B tube amps which sounded romantic, hence, suitable for some music only. You can throw all kinds of music at it, and it will reproduce music true to its design. Most 300B SET class A amps or even 211/845 class A are lower power...to make it high power, manufacturer chooses Push Pull DHT design...Coincident has amazingly made it (Dragons MK2) similar to the more accurate Franks, in terms of tonality, PRAT, Bass,dynamics and soundstage. If your source and preamp is up to the task, you can hear more details.
Personally, i like the sound of Franks but prefer the power and bass weight of high power SS amps. If bi-amping is not in your plans and you're not planning on upgrading your cables to get more bass weight (a costly route)...you might want to consider either upgrading your speakers or even add a quality subwoofer like REL, JL Audio or Seaton Subs. I have not heard any of these three subs, but the reason i suggest a subwoofer is, I've tried connecting a HT subwoofer, Energy brand, to my 2-channel music/movie setup, and the bass weight was much better with subwoofer when watching movies. Even when listening to 2-channels music, it did sound better with more bass weight.
There are some audiophiles who uses Dragons MK1 amp as bass amp (in bi-amp setup) only if details and noise level bothers them. Mk2 amp is a huge improvement, imho, so the pricing and performance will more than justify the purchase compare to getting the Franks.
Jimmy