I did a bunch of research on what brand to get also. I decided on the New Archery Products (NAP) Spitfire. Here are the reasons why:

1) They don't require o-rings to keep blades retracted during flight.
2) They offer practice blades so you can practice with the actual component you will be hunting with.
3) No more worrying about your point of impact changing from practice days to hunting days.
4) Solid company with well designed products
5) NAP has great customer service and technical service if you ever need it.
6) 1.5 inch cutting diameter from a 100 grain tip.

I believe they offer the best mechanical broadheads on the market. Here is the link to the product. http://www.newarchery.com/broadheads/spitfire.asp