Surefires are over priced, IMHO. For 1/2 that, you can get a Solarforce that is 2x the brighter. Or, for the same price, get an awesome Eagletac that is still 2x brighter.
Only Surefire I'd ever consider would be the X300 - a pistol light. If I had to pay surefire prices, I either wouldn't have any lights, or I'd have 1 or 2 - and not 20+
I know many with Solarforce lights AND Surefires. They all say that the quality is the same in their eyes. The anodizing on the solarforces are pretty nice