Delay pedal reccomendations, anyone?

I want a delay pedal for my guitar. I like the delay in my Digitech pedal, but that pedal doesn't play well with my amp and isn't battery powered. The delay effect in my amp gets the job done, too, but I can't just click it on and off like I could with a pedal (I have to stop playing and hit the bypass button on the amp).

Requirements:
As cheap as possible
Barebones, I don't like a lot of fluff to fiddle about with
Small form factor would be nice. I'd like to haul it around with me to cons.
Being able to tap it to set the delay time would be nice, too