I'm one of those who swear by Sharpmaker. Get model 204 as it is self contained in a box. If you're experienced in freehand sharpening, get EZLap Pocket Diamond Sharpeners or DMT Diafolds, they will sharpen your knives in no time. There's a new product from Gatco called Tri-Seps, though I've never tried it, that will fit your criteria.
Take care,
Reynaert