I also use a TLR-2. Mine is several years old. The newer ones come with a strobe function on the flashlight, which would be useless to me. Streamlight has a great warranty - lifetime - that I had to use once. The laser got "blurry" for lack of a better work. It wasn't throwing as a "pin-point." I wrote an email to Streamlight explaining my problem and they said box it up and ship it, they'd fix it. Never asked if I was the original owner (which I am) or if I had a receipt or anything. I got it back in less than 10 days, which surprised the heck outta me (they said give 'em 30 days, which in itself ain't bad for some warranty departments), and it has worked flawlessly ever since.
The point of me telling you all that is that the TLR-2 is one of the more expensive combo-lights on the market. You can look at that two ways: One, if you buy new and have to spend a bunch of money, at least you'll know that Streamlight stands firmly behind their product, and that's worth a bit extra. And two, you can find one used on ePray or wherever, and know that even if it was on its last legs, the company will fix it for nothing more than shipping charges.
As far as anyone giving you special scrutiny because of accessories you have installed on your weapon, I agree with everyone else, it probably ain't worth giving a second thought to. All the cops or a prosecutor wants to know is were you justified in firing your weapon. Unless you live in the belly of the beast, like DC, NYC or Chicago, you shouldn't have to worry about being made an example of as long as you pull the trigger at the appropriate and legal time. As someone else said, being able to identify your target is the responsible thing to do. It doesn't make you a wannabe killer, and any prosecutor who tried to assert such, would make themselves look agenda-driven in front of a jury.
Good luck. Let us know what you decide on.
Blues