NO! Don't do it!
Run away! Run away now! Run fast!
Forget Surefires while you still can! Turn away before they ensnare you into their web of coolness, undermine all semblence of your self-control, take over your time, your life, your wallet!
Resist now! Line your hat with foil and stay away from power lines, don't let what happned to us, happen to you!
Oh, ferget it. The E series is a good place to start, or even the G2 for a "full size" 2X123 SF with P61 capability and able to expand its use with the rechargable kit.
By all accounts, I've heard alot of good things about the ASP Triad, but they're harder to find, and harder to find parts like bulbs for. The beam is supposed to have a little better "throw" than the 2X123 SF with the P60 bulb, but the P61 raises the SF back on top.
The only "full size" 2X123 I have now is the M2, it's expandable to rechargable, to a 3X123 (with the ability to use the P90 and P91 bulbs), and a Turbo Head with the 2X123 and 3X123 Turbo lamps, and, IIRC, both of the M3 lamps as well.
I've found, IMO, that the M2 is worth the extra money (depending on where you purchase). There are enough additional perks and features that make it a phenomenal flashlight.