I highly reccomend the Boss RC-20 (I own one). I think it's a little more user-friendly than the Digitech.

How do you say "I'm okay" to an answering machine?

i know this isnt input really, but i couldnt help but mention that your OP looks like a few haikus on top of each other lol
Gibson Les Paul Studio
Highway One Telecaster
Dean Evo
Mesa F-50
Laney GH50L
Vox AC30 C2
Ampeg V2
To sum up:
Digitech Jamman > Akai Headrush > Boss RC-2

I've used them all and the Digitech was by far the most user friendly.