There's plenty of factory 10MM ammo available here (CCI & PMC mostly). It is expensive and that may explain why it's still on the shelves.
I've been reloading since I got my 1006 in the early '90s but now I'm having a hell of a time finding bullets. I'd love to shoot it more, too.
As for the original question, I'd go for a 1911 in 10MM. The Delta Elite is nice, but way overpriced for what you get, although I have to admit I've been thinking of buying one now that Colt is making them again. If S&W would offer one for less than a grand, I'd jump on it in a heartbeat.