The mark IVa is going to be the next C+ in terms of going to the moon on resale price. They're already starting to. The early IV, is still the best balance between the IIC+/III "organic" tone, but still being able to dial in a modern tone, and having footswitching capability over everything that really needs it. Anything that goes wrong on them can still be fixed pretty easily. i know people get so scarred of the IV when it comes to teching it, but its really NOT THAT BAD. its just A BIT cramped in there. nothing lilke modern mesa which speak for themselves in terms of over complexity. mesa "Best days being behind them" was already there. they don't like to rehash their past classics like marshall, vox, fender, etc. even the mark I reissue was pretty much a mark III chassis and cabinet with a different board, and back pannel. the jp-2c is probably a fantastic amp, but it ain't a c+ reissue, we all know this.