IMHO a light is a better investment than a laser...personally I've never been a fan of lasers. I would rather be able to illuminate my threat to identify my target than have a laser. Just my opinion. There are a lot of good light choices out there.
Inforce APL, stream light TLR series and Surefire X300U which is what I use and recommend based on experience, illumination and durability of the three. But the others are good options as well.
Sorry I cannot point you in the right direction as far as lasers....IF I were to get a laser it would be in combination with a light. Such as the Surefire X400, however they aren't cheap.