Aguilar Agro rackmount...
Just got my hands on one of these courtesy of fellow BT'er SpankyPants...
I was a little trepidacious about dropping $200+ on a single purpose "pedal" since I'm accustomed to sub $100 stomp boxes, but I'm glad that I did, because this thing is AWESOME.
I don't think I've ever had an overdrive that didn't suck out some of my low end. The EQ section and deep switch on this are a gift.
Plugged it in, kicked it on, and it sounded good before I even started messing with settings. And it's versatile, too. I had a hard time settling on just one sound because everything I did sounded great.
A think a DB751 just made it to the top of the wish list - it would be utterly terrifying paired with this unit.