Thinking about getting a urethane ball to combat very dry lanes.  Have narrowed this down to a Blue Hammer, Storm Pitch Black and Storm Super Natural.  I realize that two of these are solids and the Super Natural is a pearl.  Since I don't have a lot of revs, I'm leaning towards the Blue Hammer or the Pitch Black.  Would appreciate a little input from folks who have used any of these or have bowled with someone who uses one.   

I have slower speed (13-14 mph) and, as I mentioned, lower revs.  In the past, I seem to have done better with solids.

Thanks for the help.

My first question to you is what are you going down from?  What is your current "dry lane" ball and what is it not doing for you?  You may need what the Blue Hammer or Pitch Black offer (traditional urethane reaction) or what the Super Natural offers (more resin like).  Or, if all your equipment is high end, you may not need to make the jump to urethane. 

The Blue Hammer and the Pitch Black both pick up pretty early (traditional urethane reaction) and can die if your speed is too slow (Pitch Black is usually considered stronger than the Blue Hammer).  The Super Natural has some resin in it but is still pretty weak.  Has a little natural length and provides more of a reaction on the back end.

From my perspective, the closer you are to rev dominant the more the coverstock type AND the surface make a difference.The closer you are to speed dominant or matched, the less difference it makes.

Personally I found the polished SuperNatural to be very susceptible to carrydown of the least little bit. If you dulled it slightly, maybe 4000 grit, it was still useful but handled/required more oil than it did when it was polished.

FYI The Supernatural is a hybrid (part solid, part pearl) urethane/resin blend.
The Blue Hammer is also a urethane/resin blend.

I found the Blue Hammer more useful on a wider variety of dry/light oil patterns, than the SuperNatural and I had better luck with its overall hitting and carry power than the SuperNatural. The Blue Hammer was more amenable to surface changes from 2000  to 4000 grit dull and 2000+polish to 4000+ polish. It was always  a mild, arcing, great carrying ball from the 3rd arrow to the 1st arrow. It is slowly growing as valuable to me as my Blue/Green Centaur.