Hey Metropolis, the tone comes from a variety of places but primarily from your fingers. I've never had the need to use additional eq with either MP1/2, granted I use a couple of additional tweaks in the MP2 9 band graphic but nothing big. If you really want one (and there are shitloads to choose from), they all have a "sound", pick one you like the sound of that goes with your rig. The really expensive eq's are typically very transparent. I've used lots of different brands over the years but in a PA context and I've been gob smacked by the difference in the way they sound (without climbing into the circuit and why they may be different). Again remember that graphic eqs for audio are mostly set at the ISO standard centre frequencies which suit full range audio. The guitar centric eqs' (like the boogie one SC suggested) have the centre freqs' set (as does MP2 9 band graphic) where it works best for guitar (so worth keeping in mind). IIRC RandallRG really liked his MXR 6 band eq (better in front of MP1 or in the FX loop as is mono but is analogue ), this is a guitar eq, made for guitar players. Do you really need more eq ?? Anyway your preference, my 2 cents worth.
Cheers R