I'd have to go with the Glock, all things being equal. The Glock has been around longer and will stick around while the other was Sig's first attempt at a polymer pistol and it wasn't well received. Not sure how it will be to get parts for the Sig down the road and, of course, there are many more accessories available for the Glock. Also, I've read of issues with bending the Sig takedown pin....the one I tried in the store wouldn't even go back together. Having said that, I've been tempted by the Sig since the price, with night sights, dropped to the high $400 range. I'd get one, with thoughts of collectors value...but that is risky.