All three options (RSC, IMS and Renown) appear nice when the proper body shop spends time on them. I highly suggest you pick a body shop that has worked on Lamborghini's before and is willing to be patient. It seems like most people are spending at least a couple days of fitting to get the gaps right. I don't know for sure because I didn't measure but the shop I used was even able to do better than the original gap after requesting that they take their time and get it right. Once it is on though (and right) you will never know how you went without
The point is to have patience (and money)...then enjoy.
I went with the R70 from Renown. I painted it like the new LP570 with black bottom and center carbon fiber piece. It is awesome looking!