The two things I always recommend in these threads is choose what type of sights you want and whether you want a GI or beavertail grip safety. Choose wrong on either two, and chances are good somebody is going to be grinding or welding on your gun to fix your choice error.
Three key points to consider
1. The 1911 is not a Glock. Parts don't just snap into place. Currently, there are probably two dozen companies making 1911-type pistols, there have been more in the past and will probably be more in the future. There is probably the same number of companies making 1911 parts. Not all of these are the same. The old saying is "there are no drop in parts in a 1911".
2. Sights - folks new to the 1911 don't often realize not all sight cuts are the same even within the same manufacturer. Colt uses at least three different rear sight dovetails and some of their front sights are staked in post/tenon and some are dovetailed. The key point for rear sight dovetails is that most adjustable rears use a different dovetail than fixed rears. Choosing one and wanting to change to the other will severely limit your options unless you want to weld or grind on your slide.
3. Not all grip safeties work on all frames. If you choose a gun with a GI grip safety, and decide you want a beavertail grip safety, chances are good you need to grind on the frame to get the grip safety to fit. Unless you bought a stainless steel gun, you'll then need to refinish the frame, and probably the slide, if you want them to match.