I use the Sling Blade right now, and the Big Deal is on it's way. I'd also like to add another ball to the arsenal, and the two I'm looking at right now are the Zone Classic Green Pin and the High Rev. Any thoughts on these two balls? What are the major differences between the two? I could go with the High Rev and be all hammer, all the time, but I do like the looks of the ZC and what I've heard thus far. Thanks!