Meatwad, there are a lot of 1911 models out there, make sure you try a few before spending $. Try and find a range that rents various 1911s and shoot some before making a decision, even regarding which caliber you want 9/45. 9mm is on a big upswing in 1911 sales, a very large portion of the 1911 market is 9mm now, with good reasons. Higher magazine capacity, less recoil, less cost, and with newer ammunition technology, very good effects on targets compared to the 9mms of the past.
Like Maverick mentioned, adjustable sights might be something you want to consider, but there are positives and negatives with pretty much every facet of picking a 1911 when it comes to features such as this. Adjustable sights, if you intend on taking any training on CQB pistol shooting, will frequently break when you use the sights to manipulate the slide for one handed malfunction drills etc - you'll be using the rear sight assembly to hook onto your belt, shoe heel, etc etc if you can only shoot/reload/clear with one hand during training drills. That said, with fixed rear sights you'll lose the ability to adjust the elevation of your sights, and sometimes even the windage as well depending on the type of rear sight.
I've got a few 9mm 1911s, a Nighthawk 1911 in 9mm, and a couple Kimber 9mm. My old company was the national distributor for Kimber here in Canada, so my vault at home was lousy with their stuff.
Again, try and at the very least hold and physically evaluate in person any 1911 you plan on buying as your first handgun. As well try and shoot a few different models and calibers too. Do research as well on any models you have it narrowed down to.
I still have my very first 1911, one of the Valtro 1998A1 models John Jardine made, I got one out of his first batch, and have 20k through it. I got pretty lucky getting it, and didn't buy it out of knowledge, research, or doing anything I should have done before purchasing a "first" handgun of any type. There wasn't nearly as much or as easy to access information back then, so take advantage of this Meatwad and make sure you get something you won't have any regrets over.
