I like the Hohner 260 Chromonica 10-hole. The 270 Super Chromonica is a 12-hole, only a few bucks more, and much more commonly used by pros. Still, I like my 260 a lot. It's small enougn for my pocket, and has good tone. Don't buy the Slide Harp if you want a true chromatic. Also, stay away from Chromettas, which at best are toys. George Mayhew