[Spats McGee]

First, my caveat: I don't know a great deal about Sig pistols, or the market for them.

With that out of the way . . .

As for the mag disconnect safety, there are some shooters for whom that's a deal-breaker. How many? I don't really know. Run a search on this board for the appropriate terms and you should be able to find some threads on it. That might give you an idea of how many gun owners like or dislike them, and how strongly they feel about it.

From reading prior posts, it sounds like it will accept 15-rounders. (I don't know enough about this model to say, from personal knowledge, whether it will or not.) Assuming that to be the case, I'd take the $800 one, with an eye to getting more & larger-capacity magazines later. First, though, I'd offer him a little less to see if the deal gets any better.

So there you have it: One Spats McGee original, largely uneducated opinion.