I had a Sterling ST-51 about 7 years ago, it was a typical high-end/brittle hyped sounding mic. Very similar to much of MXL's offereings. They are good for the price, but I got rid of it for mics that didn't require as much post processing. I have no experience with their $400+ range, those might be considerably better. For inexpensive and seriously good ribbon mics, APEX makes some for about $80USD that are deadly.
I would take a serious look at the Lewitt stuff, especially with the PLAPA discount. Those are seriously good mics for a very low price because of the deal Warren has arranged for us.