FlameOn,
I own, or have played extensively with most of the lights in the class you are considering, and I have to give a very strong recommendation for the TigerLight with premium battery pack and Gen4 LA (all new TL's have the Gen 4).
bwaites (Hi Bill!) recommended the SL60, which is based on mod work I do. The short of it is that I pot a WA 1160 20 watt lamp into a fixture-ring which then gets secured into a modified Carley RF1940 2" reflector. This whole LA then gets installed into the SL20X in exactly the same way as an SL-20X LA or 35X LA. It is brighter than the 35X, with better throw and a nicer beam (if you use OP coating on the reflector). It's a nice light, pretty much the same as a Mag Charger with the 1160 installed--same lamp, same battery configuration.
Now, that said, I can tell you that I would take the TigerLight with premium pack and Gen 4 LA over the SL60 (= SL-20X w/1160) anyday. It runs for 66 minutes, throws farther, is very nearly as bright, and is a lot smaller (FBOP version) and lighter (either OC or FBOP version).
Check out the threads on the
The Gen4 TigerLight lamp assembly and the
The New TigerLight Super-Premium Battery Pack.
My TigerLight is one of my most used and loved lights, and that's been the case for far longer than I have been consulting for TL. In fact, that's how I got the job--I was doing it anyway!
And, more good things are in the TL gold system's future. More powerful LA's, for example . . .