I've got a SpecterDR 1.5-6x on my SCAR 17. I'm reasonably pleased with it, but that price is a pain in the balls for sure. My biggest gripe is that, while the thing seems pretty sturdy, for that kind of money I expect ELCAN to have a warranty like Vortex does -- it doesn't matter how it gets fucked up, a replacement gets sent. From what I can tell the warranty is pretty much bog standard.
Practically speaking, with the 1.5x I'm pretty happy to use it as a scan optic, and the 6x works good for precision. I'm pretty pleased with the reticle, and the illumination functions work well, though the full-on crosshair illumination is a little funky in that it doesn't actually illuminate the entire thing like one might expect. Not really a problem though, just odd.
Despite the fact that it's got a dot, picking up up fast will take a lot of practice and muscle memory. I wouldn't feel good snap shooting with one, but it does have basic irons on top and you can always add a red dot. I perched a little Vortex Venom up there, but haven't had a chance to play with it much since. One thing to note about the irons is that they're pretty low, so the front flip-up lens cover pretty damn near obscures it if you go that route. You can thin it out with a Dremel and have it workable, but frankly I expect better on a piece of kit this pricey.
In terms of logic, it looks like you're kinda on the same page I am. Fuck it, it's either lowest or max power, the middle range is almost never used. May as well make the transition fast and easy.
Long story short: It's a good optic, I like it. Is it $2500 good? Ehhhhhh... at that point you really need to play with one, IMO. Personal preference is what's going to decide that. Unfortunately, they can be a pain in the dick to find. Would I buy mine again? In the same circumstances, yeah, I probably would. It was a treat for myself and funded entirely by overtime cash worked explicitly for that purpose. I'd be a hell of a lot happier at a better price point or with a better warranty though.