Wheel Size Question.

Being new to mopars and cars in general the importance of backspacing is not lost on me but hearing others experience and opinions is a much bigger help than doing it myself. Sound advise and experience given off my measurements is why I come here and many people seek out 72bluNblu just for that reason. On that note I have another question, A-R 515 wheels and even others come in a 4.81" BS size, would that be a good option for the rear with a .25 spacer with plenty of stud engagement or would the 4" BS be a better option? I saw a picture of your challenger with the vision 17 and they did look really good, Id prefer polished wheels but still considering those. Thanks again