I wouldn't think any reputable 1911 makers would need all the work you mentioned out of the box. And even if that was true about para there's plenty of 1911 manufacturers in that price range that are great.
Oh yes I'm a 1911 convert so if have to say go with a 1911,you won't regret it,para or not.
Do your research and pick up the 1911 you decide on and then go shoot it,if it acts right (which it should) then don't fix what ain't broke.
Also until you get up into the higher end production 1911's the next stop home with your new 1911 historically is to buy some wilson or tripp mags and throw the factory ones in the garbage.