I think you'll like the P250. I looked at them myself (in the .40) and they're really nice. I know some Sig folks don't like them that much due to their polymer elements, and there is a pretty long reset on the trigger, but like you said that just makes learning a new gun fun!
I just got a decent deal on a Springfield Champion Loaded in stainless, and it's also very accurate (I'm also finding the dual spring setup really helps recoil and allow for quick successive shots--I'm about as fast and accurate with that as I am with my friend's G19 or my XDM .40). In any case, I think you got a nice gun with the P250.
FYI by the way, in talking with the folks at Springfield about getting papers, grips etc. for my gun, I asked them about the XDM in .45--they told me it will be released within 6 months. I love my XDM .40 so this will be one I'm gonna start settting money aside for!
Take care all.