As far as the quality of Microfire's, I don't think you will find any better without being a custom. I have 2 Microfire L500R Challenger's and if the other lights they make are anything like these I think you would be very happy. If you want hefty, the Challenger's are a couple pounds each easy. I swear it feels like they are made of lead. I don't own a zillion lights, but I have JetBeam's, Surefire's, Olight, Thrunite, Microfire, Pentagonlight, Zebralight, Nitecore, Sunwayman, and a couple others, and as far as quality the only one close to the Microfire's is the Pentagonlight MS2-A01 weapon light. It's built like a tank too, but only around 100 lumens. I guess it's possible not all the Microfire's are made the same, but these are very nice. Take care.
J