Duane's advice about renting a gun is excellent.
Kevin, as far as the latter discussion goes, that's gonna happen whenever the words 'revolver' and 'reliability' is used. (I'm new here but not new to gun forums.)
Anyway I've carried an SP101 the last couple years and highly recommend it. Are the CT grips you're looking at the newer, softer ones? The original CT grip was a fairly hard plastic. I have the rubber Hogue Monogrip on mine and I love it. The stock grip is more concealable but I can hide the Hogue just fine; I'm a sloppy dresser. With the Hogue, and probably the CT, you can fire the most scary-fun fire-breathing .357 ammo in comfort.