Hey Thrash!! My main amp right now is a DC-5, which is the same amp but 50 watts instead of 100.
When you say, "it isn't what I need", what is it exactly you dont like?? Not bright enough? Not enough headroom? To much bass and not enough treble? That will help us help you the right way. Now N Days there's a million options for how you could use that amp. You need to find the one right for you.
Now until you get a little more in depth about what you don't like, I can only suggest a few things. I wouldn't suggest an EQ 1st. The Mesa's 3 band main EQ with 5 band parametric should be more than enough to EQ the preamp section. Anymore outboard control IMO would be redundant. Plus its footswitchable, something thats hard to come by on a rackmount EQ.
Ever tried a BBE Sonic Maximizer in the loop?? I've used Sonic Max's for years with numerous setups, if I didn't have one in the loop of my DC-5, then it would not suffice. I would basically say its not cutting it. But because of the BBE, it makes everything sound friggin HUGE. It clears it up and makes the sound very spatial. Some consider the BBE a type of EQ, which it is and it isn't. But it mostly isn't. Heh
. Its really a phase corrector. Check out their website for more details, but I strongly suggest trying one!!
P.S- How much did you score it for? If you dont mind me asking.