My little Korg CA-30 is perfect as far as I'm concerned - chromatic, accurate and small. I don't play gigs, so I don't need a pedal tuner like Clinton. Cost about £15-20. The Intellitouch is better if you're tuning a pure-acoustic (ie. no pickup) instrument in a noisy room, but I don't think it's as easy to see when you're getting close to being tuned correctly, and it's *significantly* more expensive! Any online music shop should do them - GAK seem a reasonable place.

Graham.