I have a built in compressor on my combo amp as well as the M80 and I use the Boss DD-6 Delay which is awesome. Way more than I really use though, with the reverse and all. Warp is a pretty cool mode. Its got the tap tempo and hold function as well. It handles the bass incredibly well. Most modulation pedals will work just fine with bass anyway. I've had no problems with the DD-6. Super easy to use, sounds incredible, and it's loaded with features. I couldn't tell you much about other delays. Regardless, I hope this helped; a little anyway.
