Re: Thinking about getting myself and STI, opinions???
Both of the guns you've mentioned are double stack guns with polymer grips, which are patented by STI and thus not available (or comparable) to a 1911. The two guns share a lot of features with a single stack 1911, and many parts, but typically if you're shopping for one, you're not shopping for the other, they're totally different configurations of firearms.
My suggestion if you want a single action, double stack, 1911-style gun in 9mm is that you look at the Eagle 5.0, with a bushing barrel. The extra weight of the Rangemaster or Edge is unnecessary in the 9mm caliber.
STI also makes 9mm 1911s, of which I have one of those as well.
STI is my favorite producer of factory-made 1911s by far. Their customer service and warranty are excellent as well. You really can't go wrong.