The 1040 (1 row 4 bass buttons) is a fine instrument if you can get one for cheap (say, 200$ or less, a bit more if fully refurbished and sold by a pro). An ideal starter box.
If you want a really versatile instrument, you may want to look at the equivalent two rows (Hohner 2915 or Erica).
The April 2011 Dewey Balfa Cajun & Creole Heritage Week
