My reason for purchasing the Ra is not listed, so I'll spell it out here. I typically jump on the "latest-craze" of lights, in my never ending search for that "perfect" light. I thought I had found that in the Titan, but can't get past the fact that it's CR2 based. I really do think the "tank-like" build of the Ra is going to be beneficial, however at a cost. The cost of size, heft and weight. I'll know that for myself tonight, since my Ra was delivered an hour ago.
My biggest reason for getting the Ra is to compare it to the Arc6, head to head. I don't like to comment, too much, on a product that I have never seen or used. It would be unfair for me to praise or trash the Twisty, without have ever seeing or using one. Now that it's been publicized that the Ra can be customized, that make a huge difference for me too. I don't like being locked into a products pre-sets.