The ball is VERY strong and angular. If you've ever thrown a mean machine, then make it a foot longer with a more explosive break and you've got a power machine. I've had the Agent before and its a lot more controllable than the Power Machine. The Power Machine can be a victim of over/under at times and you really have to be spot on with your shooting. If you are consistently hitting the target, then the Power Machine is a GREAT ball, it just seems to carry the world.
On the other hand, when I started out with my Agent, it was great at reading the lanes and a lot more forgivable if you tend to spray the ball like i do =) They're both good balls IMO. The Power Machine with give you good length with a hard snap at the end, the Agent will give you a little earlier read with a more rounded breakpoint.
--------------------
Bowling Since March 2006 - "Get coaching, don't worry about it"...blah blah balh...Just answer the questions please
Mean Machine > Power Machine > Equation > Heat Blast