I looked into the Streamlight TRL1s and found it highly regarded. However, since I need a laser also, it won't work for me. I went to my local gun shop and found that the Insight M6X Tactical doesn't fit on my M&P40 4.25". The rail is not long enough. That light/laser is intended for rifles. They talked me into a Streamlight TRL2s for $299 + tax. I took it home and found that device to also be very highly regarded and that I could get it at OpticsPlanet.com for $245.99 with free shipping and no sales tax. Since that saves me over $75, I ordered it on the spot and took the other one back to the store.

Apparently, Insight made the Streamlight devices originally, but now Streamlight is totally separate. I am quite excited to get the light/laser and put it to use. I feel like I have obtained a quality device for protection of my home and family and probably at as good a price as possible. I appreciate the responses, as both have been helpful.