I'm actually torn as to whether or not to snag a JCA20 or an HT-5 when I end up in New York. They're such different animals it's hard to choose, and they both sound FANTASTIC.
-One great sound
-But man, what a sound!
-Better volume knob dynamics
-Great classic voicing
-Loud enough to gig with
-Combo version can fit a real speaker
-Great cleans and excellently voiced drive channel
-More gain available
-Sounds great at a variety of volumes
-Not a bad sound to be had, really
-Readily available used
-Tighter, more 'modern' voicing
-Sounds best at slightly above 'apartment' levels
-Less tonal variation
-Brand new, so hard to find used
-Larger and heavier
-Needs big or efficient cab to keep up with a loud drummer
-More expensive new
-Slightly more compressed and slightly less dynamic
Both amps are seriously fantastic value for money. The HT-5 is more targeted as a practice/recording amp and has a different feature set, while you could do pub gigs with a mic'd up JCA20 and not be struggling for stage volume. I need to sit down and do a head-to-head with these two amps.