I have a Glock 30 .45 cal with rail and adjustable sights and a friend wants to trade me a Sig p229r in 9mm with a rail and night sights. Both guns are in same excellent condition. I love my Glock and I'm also a big fan of the .45 cal but have heard such good things about sigs. I have also heard people say a sig will outlast a Glock because its a metal frame as opposed to polymere. I know alot of it comes down to personal preference. Someone convince me one way or the other.