STI's are great factory 1911s. They are great out of the box and easy to drop in parts as you need to.
Dlask are fantastic semi-custom 1911s. They both cost very similar, but with the Dlask you can throw in little custom touches that fit you better for a great cost. You can chose your sights, trigger, hammer, thumb safeties, magwell, checkering, etc. And, you'll get local warranty service that's pretty great. Make sure you ask for Joe to make it for you. The biggest downside, in my opinion, would be the wait. It could take about a month or two.
So, it kind of depends on what you're looking for.