Billq,
Sorry to be so late in responding...I've been away on work for a while. As to the Bad Monkey, try increasing capacitor C5 from the stock 0.047uF to 0.07uF, 0.1uF, or even 0.15uF. The higher the value, the more of the mid boost this will take out, giving a more transparent and full-range boost. Combine that with the fact that the Bad Monkey already gives you the ability to boost the bass significantly, and you can get fairly close to a Fulldrive2 or OCD kind of sound, at least in terms of the tone curve. It still won't have exactly the same sound as those pedals, but then it costs like $1.95 comparitively.
If you've got a good amp to run into, a modded Bad Monkey is good enough to make it sound really nice for not too much money. Very good value for the guitarist on a budget.
SteveP,
If you're running an EL-84 amp, you really don't need to tighten the bass. The EL-84's are very similar to the EL-34's in the Marshall or Stilletto, only a bit brighter and tighter if anything. If you want an overdrive without a mid hump, then I've already gone over a few. The OCD, the Fulldrive2, the Xotic BB Preamp, and the modified Bad Monkey would all fill that bill. However, a fuller range tone response means more bass, and that means a looser bass, not tighter, so you may just have to experiment a bit to find the balance that works for your ears.
Dusty Rhodes,
RE: "When you say "if front of the amp" do you mean NOT running through the FX loop?". Yes, that's exactly what I mean. You will never, ever, ever run any overdrive AFTER the amp's preamp....that is, in the effects loop. That completely defeats the purpose of what all overdrives are designed to do, which is to take your guitar's signal and crank it before it gets to your amp's preamp section.