picked up a 400RB-III and a 115blx off CL this week, I didn't really want the 15, but $150 for the pair - who cares.
I wanted the head for my home office/slash music room and planned on running it through one of 4 Aggie GS112's as I had with my mesa walkabout - as I wanted to keep the walkabout scout combo ready for quick trips.
Nostalgia had me give the single 15 w/o a horn (I usually attenuate the horn in any cab to just shy of off anywho) whirl - and damn if I don't dig the old school warmth, it's just so dang deep, fat and smooth - I like it, yes sir I do!
I've run all my bad boy fivers through it: Ritter Roya, Warrior Isabella, Sadowsky NYC VJ, Sadowsky Modern, Roscoe SKB3005 and my beloved BVV - Benavente Vintage Vortex and the cheap ass little rig just keeps killing it - well at practice volume that is. Now will I be caught dead in public with this thing - hell no

! Although a little black tape does go a long way.
That said who makes a single 15 sans horn these days?