In that price range what I immediately think of BOSS CS-3, Line6 Constrictor, EBS Multicomp.
(Well, depending on what the prices are in your area)
Don't know anything about the Digitech. But IIRC I've not heard bad things about it.
No... compressor wont give you a growly tone. (unless you use it as a booster to overdrive your amp, but that's unlikely)
Do you have other effect pedals?
growl.... overdrive....
Beware of 100 suggestions for a VT Bass.
