I was thinking something along the same lines-Not necessarily a single stack because I think that's a bit primitive, but a subcompact line of firearms with full size service calibers. They have the P238 but that's in .380 and I don't like the concept of a mini 1911.
They DO have the subcompact P250... but come on. That gun is an embarassment to the P-series.
I love my P229 in .40 and will never get rid of it. But I think I'm going to cross over to the Glock 26 for a subcompact. They've been in the subcompact game a lot longer and for a subcompact I don't want a decocker, a hammer, or anything that sticks out from the frame too much. The P250 has that ridiculous pseudo-hammer thing on a DAO gun. They had the idea of double-strike ability for the P250, but why have that retarded little tin-can popsicle stick of a hammer flip back every time? They could've gone for a striker setup like the Walther P99. I also couldn't give a damn about modularity, personally. Too many pieces to keep up with.
As far as SIG pistols are concerned, I won't ever deviate from their classics unless they come up with something so brilliant in my eyes that justifies branching out.