Best thing to do I think is just to visit a shop (violin builder) with a broad selection of bows and try, try, try! Be sure to bring your own violin, I found that bows feel different on different fiddles (or rather the strings, probably). When I couldn't decide which bow to take, the builder allowed me to take home a couple. I found that after playing a little bit longer than you would inside the shop, the heavier bow (which I preferred at first sight) became to heavy, so I opted for the lighter one.
Good luck!

Letty