Y'all know what I'm going to chime in with here....
Eventide TimeFactor. I've had a number of "other experiences", MXR, BOSS, EHX, etc. The beauty of the Eventide is that, much like Diezel's, it's extremely high quality and very very neutral in its tonal impact, if at all. It's a complex little gadget, but once you get it figured out, you won't believe your signal's going through a stomp - it's perfect. As for the effects one can render with the TimeFactor, more than you could possibly imagine - and they're all awesome.
V.