Thanks for the heads-up regarding rechargeable 123As; Guess I'll be avoiding them.
In the review that is linked to by that product page, it's mentioned that the 18650s result in a lower output/throw.
In reality, the light with either the CR123 or 18650 would look so similar that you would have a hard time seeing any difference in output.
The beauty of the 18650 is the long runtime plus it being rechargeable.
The review is fairly current (Februrary of this year.), so I assume that factor still applies?
I'm not positive, but I think there have been some improvements in the driver, and I believe that Epsilon is now supplying the drivers which are supposed to offer more features and more efficient (longer) runtimes. You can brush up on the newer models at the following link, and you might join in at the end of that thread and ask any specific product questions you have: http://www.cpfmarketplace.com/mp/showthread.php?t=167918
Another factor in my purchasing will be accessory availability: I'd like to be able to use blue/red filters so as to not kill my night vision when walking around at night.
I don't know about availability of dedicated filters for the M1, but I have personally made a couple of my own when appropriate, and more to the point, I have ended up with other lights that are dedicated filtered lights (red is all I need for my aviation requirements).
As a CPF'er, I would imagine that you will also get a dedicated light for specific uses.
Also, is there something "special" about the Cree LED that wholly bests the LEDs used in the LumaMax line of SFs? It seems to be able to output much more, while still maintaining a good chunk of the run time on 123As.
Surefire has never been at the forefront of LED technology. Whenever the newest, brightest LED's come out, do NOT look to Surefire to start using them as a "first adapter". The Cree used in the M1 is one of the later ones.
The newer LED's are more efficient besides being brighter, and the way a driver is made to make best use of the battery type it's optimized for will make a difference in runtimes.
Regarding retrofitting the Minimags, I may eventually do that, but I'm not sure it's worth it. They were cheap when I got them, ages ago, and they're pretty beat up - To the extent that one of the tailcaps won't come off because it managed to rust itself on well enough that I couldn't get it off with a vise and wrench.
I wouldn't have intentionally gone out and bought a new MiniMag just to upgrade it, but since I had two, almost unused ones, sitting around, I decided to either throw them away or upgrade them (I never used them because they were so pitiful compared to other lights I have).
I spent $5 on a Niteize 3-LED upgrade which was a huge waste of money for me. It's probably good for someone who actually wants a low-light MiniMag, but I didn't find it useful at all, not to mention how the angry blue tint was quite aggravating to me (I literally threw the module away in the trash).
However, I still thought the MiniMags would be fun to upgrade so I bought two of the Terralux TLE-5EX units for my two Mini's, and they were great!
At $25 a pop, they're not cheap, but they made my MiniMags into lights that I actually use more often than I thought I would.
As a reference, I compared and found that the Terralux's in my MiniMag's gave a virtually identical beam to the medium setting of my L2D-CE/Q5, and that's saying quite a lot for the Terralux.
So I'm glad to have spent the money on the Terralux upgrades for my MiniMags if only for the fun I got from it.