Most Behringer amps are too sterile for good GD playing.
Do you own one? If not stay clear. They are a great value for the money if you get one that works. Most people I know who play Behringer products get one or two duds along the way then get one that is perfect and they last forever.
Basically effects should enhance an otherwise great tone.
If you don't have great tone now, I'd invest in a better amp before I'd get effects. If money is tight trade it in and get a Fender Deluxe for around $500. 40W, single 12". You'd likely get at least $125 for your amp and apply the $200 you'd spend on effects and you are darn close.