I use the 150 gr. 2 blade myself just because of personal preference. Like everyone has said you can't go wrong either way. I started using them 5 years ago and honestly will not use another brand as long as I can get them.
As far as the regular or buzzcut that again is a personal preference. I personally do not like a serrated edge of any kind on a broadhead. If you think about it, wouldn't you rather be cut than ripped? Again it's a preference of my own and I mean no disrespect in any way towards anyone who uses a serrated blade.