I sold my Engl E530 preamp but kept my Engl E850/100 power amp with dual 100W 6L6GC power amps.
I've been looking at Synergy SYN-2 as a preamp for it, on and off for a few years now...but was busy getting other gear.
I have my Marshall, Mesa, Diezel, Fender, Engl, tones covered; so looking for something different from what I have.
I really like what I heard of the Vai module, for clean and lead, so that's one; looking at other modules for 70's crunch and modern, tight, smooth prog rhythm tones...open to modules to consider, so far the Ecstasy, Fortin Killer Kali, Pittbull,...