In the current Hammer line up, I've have/have thrown them all. Overall my 3 top picks, in order are...
Toxic
Beat'n
BW (solid)
The toxic is super forgiving and hits like a brick, the beat'n can handle almost any oil I ever bowl on, and the BW is a great benchmark, kind of go-to ball. (even though it's a little snappy for some people to be a benchmark.)
You really can't go wrong with the anything in the current line up. Hammer is really making great decisions right now as far as equipment goes, and whatever you choose, you'll see that.
Matt
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http://www.hammerbowling.comhttp://www.hammerstuff.com"Nothing Hits Like A Hammer"