Bottom line; if you can afford it and you want it...Get it.
I see nothing wrong with that at all.
I do have a question, however...
Is there anything (modifications or aftermarket stuff) that you can't do to a lower end 1911?
Very interested...I'm actually toying with the idea of building one at some point. I'm not sure where to eventually start...But I'm the type that wants every nugget of info and opinion FIRST, at any rate.
With enough knowledge or money and a connection to a great gunsmith, you can make a RIA as custom as any other 1911 on the market. In the process, most gunsmiths will choose to use Wilson components so your gun will only be RIA according to the frame, slide, and grips (maybe the barrel and a few other parts). After all the changes, you will have probably spent as much as buying one of Wilson's, Baer's, Nighthawk's, etc lower-end guns brand new. I've also been thinking about a build using all Wilson components. It will probably be 2 more years before I start but that won't stop me from dreaming.