I've had a lot of 1911 .45's, but I stopped wanting any others when I acquired the Ruger. For me, it does not beg for upgrades of any kind. I not only prefer it over any other 1911, but also over any pistol ever made.
However, the perfect pistol for me may not be the perfect pistol for you. Some people require a safety lever on both sides, night sights, checkering all over the place, exotic slide serrations, custom magazines, tiny groups. That is not me at all. I just wanted an American made, non rattling, good sights, etc., and I found it in the Ruger. I'm not one that likes enhancements beyond what comes on the Ruger.
I take it out every day or so and marvel at its perfection and how it suits me better than anything else available at any price. Accuracy at 50 yards is acceptable, which makes it a good woods gun. Rounded corners make it comfortable to conceal carry. The 5" version (which is the one I have) makes it point perfectly. The all steel gun takes the recoil down to easy management. The grips are thin and beautiful. The tightness of it is amazing. Mine was $699 at Gander Mountain. I like it so much, I'm going to try and get the commander size, and the lightweight model. I'm greedy that way.