What key should my first harmonica be in?

To be honest a cheap set of Piedmont Blues by Hohner, granted there not exactly professional grade but as a beginner you need to find your ear and spending money on a specific key is not going to help you find it, this way you get all the most common and your not in them for more than $20/$25 bucks in most cases, once you find your ear you can spend the money on the keys you like best in a more professional harp, as I play guitar at the same time I'm usually in a G or C for my style of music, and no there not the Piedmont Blues models