So the TL-6 is better than the Cirrus 6?B -- super useful with 2 conditions
1-Tasteful --- used for build dynamics and not riding an open B all day long
2-Gear ---- some gear just will not handle a B.
Over the past like 10 years, gear has gotten a ton better... low end response and availability are now reality.
I play a ton of urban gospel (think CeCe Winans etc)... often the key is Eb or Bb
It's also useful in the country scenes to have a B string (can use a C or D..... many guys detune half step to Eb)
----
My upright... my 6 stringers (everything except my tele) are all B-B tuned..
... the upright is BEAD... so is my USA P... so is my stealth fury
I've never really gelled with a 6 string (was "almost" good enough - but not clear enough to chord with)
I gig often with a 7 string... it's rare and tough to find an extended range that eloquently morphs from bass to guitar.
----
I'll say 5 or 7 is easier with fewer position jumping etc.
I'll go on a limb and say the TL6 was the best 6er Peavey put out.