If those are your choices available, I would say the Sig wins hands down personally.
It's a well built piece, the fit and finish is nice and the weapon feels good in the hand, but all 1911's feel good in my hands for some reason.
With the "Tactical Rail" I think that is an idea that's time never came, has stayed too long, and needs to die out a quick death. You don't need a $700 combination light and laser on the bottom of your pistol. I understand there COULD
be an application for it, but they make rails for $50 that you can drill and tap onto an existing gun, you don't need to mass produce and entire line of pistols for it.
Of the choices, the Sig is a very good one, the only thing I would suggest is getting the night sights and having a trigger job done. The two that I have held, one I shot and one I played with at the Shot Show last year, had a less than great trigger on them. A little tuning and I think it would be a real nice piece for you.