Hi fleegs:
Depends on what you currently have and use, and what you plan to use the flashlight for.
I'm kind of(?) in a similar situation. I currently have an ARC LSL. I decided that I am going to buy an LS4 when it comes out. I don't have any SureFires, and I was deciding between the L4 and L5. Decided to order the L5... I'm picking it up very soon /ubbthreads/images/graemlins/smile.gif Figure it will have better throw than the L4, and that's what I want at the moment.
Of course, eventually, I will probably end up with more...
So, it really depends on what you want to use the light for.
Cheers,
eric t