For the money of any of those heads you could get a 6260 (5150)+ 333 (xxx) + 33xl (jsx) clones from bugera and have 3 different amps for the price of one. Plus they sound great.
I own the 333. I have not tried the 333XL, but if it's anything like the real JSX, which I have also owned, then it will be pretty much the same as the 333, just a little warmer overall.