There are a lot of CMP affiliated organizations, membership in one allows you to buy through CMP. Some clubs and collector organizations, GSSF, etc.
I thought ANJRPC, of which it looks like you are a member, is also a qualifying affiliated organization, but a quick look on their website didn't turn anything up. Perhaps someone else on the board will know.
Surefire X300U is the “A” answer.
Avoid the strobe.
Keep the switchology simple - light on, light off. That’s about all the brainpower you will have to spare in a real world deployment anyway.
Additionally, any strobe effect that disorients your threat, will also disorient your AND, most importantly, strobes hide subtle movement - which means you will miss threat indicators and warning signs, specifically slow movements of the hands.
Get all the light (lumens and candela) you can and be able to turn it on and off.