You're an LEO, and you've mentioned a need for a momentary function with the switch.
When I purchased my CL1H V4, I made the mistake of getting the 3SM R2 pill. Nothing wrong with the pill, but that 3 indicates the number of modes the light has. Problem is, while the forward clickie switch can indeed be used as a momentary, you don't want a multi-mode light that switches modes using a forward clickie switch alone.
Here's why..... You hit the tailcap switch for momentary-on. The light comes on in the brightest setting. However, as you hold your thumb in place, you might accidentally ease off the switch just a tiny bit. As soon as the light goes out, you instinctively press the switch again. But now it turns on at a lower level. To get it back up to the high level you need, you have to tap the switch a couple of more times so it goes to low-mode, and then back to high-mode.
In your line of work, that's not good. For a multi-mode light with a tailcap switch, a reverse-clickie is needed. That, or a selector ring on the light when used with a forward clickie. (Such as the Surefire U2).
Thankfully, I was able to exchange my 3SM for a 1SM.
If you decide to buy a Dereelight CL1H V4, look for FlashCrazy's sales thread over at the CPF MarketPlace. (He's an Authorized Dealer, and he can get you the model you want faster since he's based here in America).
You could try PMing him. But I strongly recommend sticking with a single-stage version.
If you want a lot of flood in a small package, there's the Surefire L4 model or the 2008 Inova T1. (Just be sure it's a 2008 version. You can get one from BatteryJunction.com).
Also, the CL1H V4 that I own has the smooth reflector in it. I have mine set up for throw, rather than flood. The reason being, the textured reflector leaves dark rings in the beam. There's a hot-spot, followed by a large dark ring, followed by sidespill. The problem exists with the smooth reflector too. But it's less surprising with the smooth reflector since it's geared for throw instead of flood.
Hope this helped.