Looks pretty good. I don't like the looks of a lot of tactical lights or laser/tact. light combos that stick out--they look too much like science fiction ray guns to me. Plus holstering options are limited and they can make conceal & carry problematic.
I have the very small laser, tactical light combo from Veridian on my 40 c, as it's squared off a bit like the gun is and looks almost 'stock' when on the gun:
Viridian C5L Gun Laser Sights | Viridian Green Laser Gun Sights
I like how they also make a security holster just for that set up for about $45 more. (prices vary on-line) The amount of lumen power different companies claim isn't always accurate, but the 100 lumens claimed on this seems good.
I think a strobe function is very important and with anything above 90 (true) lumens used within 10-12 feet or so, you can really disorient an intruder, leaving him seeing spots. If you're silly enough to look at it for a few seconds, it can give you a nasty little headache.
That Streamlight TRL-3 would've saved me a couple hundred bucks and looks quite nice. Streamlight has an excellent reputation as well.
If you're buying something like this, shop around on the batteries. While they're typically a bit expensive, you can find good buys, especially on multipacks. Perhaps you can find a reasonably priced high lumens hand flash light (Think Fenix) that also uses the same batteries.
These types of batteries last in storage for a long time. Just make sure the batteries aren't some cheap no-name Chinese brand--check on their reputation.