I own a handful of Surefires ... along with Inovas, Streamlights, Pelicans, Nuwais, and Mags.
While the non-Surefires are generally good "values," I've yet to find ANY non-SF brand that consistently EXCEDES EXPECTATIONS like Surefires. Oh, the others generally do fine for a while, but then ya start to notice little shortcomings when the "new" wears off.
OTOH, the Surefires never seem to wilt... or reveal another side to their character that makes you wish you'd maybe spent a few more $$ for a light that just plain inspires no-sweat confidence, night after night.
Maybe its just the fact that Surefire consistently UNDERSTATES their beam potency and runtimes. Or the fact that SF's after-sale customer service (with occasional wrinkles) still leads the pack. Or the fact that elite military and LEO units (who really do their homework) always want SF's (when budgets permit).
Cost IS a key Buy-Decision element for most of us. However, INITIAL cost is a very different animal than LONG-TERM/REAL WORLD cost... where the performance-vs.-value equation should also reflect product failure under the stressful and extreme conditions on the Mean Streets and Battlefields. However, I'm assuming here that you buy your lights for tasks beyond dazzling friends with interior beam-shots.
Here's one historic example of this performance-value equation.
When the vaunted Colt M-16 rifle first entered the U.S. military arsenal back in Vietnam, it had many failures in the field (jungles). Failures that cost good lives. Why? Because Pentagon bean-counters decided that they could save about $3.98 per rifle by eliminating the original designer's specified chrome-plated chamber/bore... a little feature which greatly facilitated cleaning... AND preventing jams. The Pentagon's original decision saved Million$. It also got American troops killed and undermined confidence in their main battle weapon. Now, flash-forward a couple decades. With extensive field lessons plus continuous engineering refinements, the M-16 evolved into great/reliable rifle. It's cost went up. too.
The Surefires are like that. You certainly DO pay for a ton of research, engineering, and field-testing refinements with their lights... pricey "development" stuff that their competitors aren't necessarily burdened by. For the average consumer who might only burn his 1 or 2 flashlights a few hours per year -- under nice, domestically-ideal conditions -- it's hard to see the value of SF's twice-the-cost products. However, re-write that consumer's
"field test" script to include a bunch of nasty little Murphy's Law (everything goes wrong) life-or-death scenarios... and he'll soon scream for something a helluva lot better... at ANY cost.
I've been there, seen the elephant, and I don't ever want to have any doubts about my survival gear when the bell rings the next time. I'm not selling my other lights, because they're a lot of fun to play with. And most of 'em make good back-ups... to my Surefires.