If you've got a pro shop close by, head there and shoot all of them you want.

What I normally suggest is that you first set a price limit. After that, head to the shop, or several shops, and shoot as many in that price range as you can. You'll know the one you want. If you're just starting out, you'll prolly want a fairly forgiving bow, one w/ a longer ATA and brace height. It's a tough thing to do, choosing a bow....There are just so darn many that are really good.