MIT gets significantly better in terms of the quality of the signal as you move up... there are however not terribly forgiving.
Maybe something that comes across easier on the source.. or preamp. Voodoo Black Dragon? It'll actually work on anything! Not a lot of money either. An Elrod Sig III on the big ol' CJ SS would help as well, if ya want to buy accordingly to the component.
BTW.. got a power cond in the mix there? that's a thought too. Might just be the power itself.
I've heard the preamp, and got the impression from talking to and reading about the CJ SS that it's mighty revealing as well and can be too articulate up top for some or just hard in the wrong setup. Some nice RCA tubes in the pre could be the deal. I use a mix of them and bugle Boys in my pre.
you've nice gear there.. just look at the peripherals, and accessories before getting rid of anything.