RC is needed bro. I do not have any first hand experience with Sai. As long as any body shop does computerized color matching, proper masking you can't go wrong. Oh wait, there is one more parameter, the tinkering/denting part. J Ravi sir's Linea got some work done around the same areas and we couldn't make out if any body work was done there. Similarly, I got some body work done on my Punto from Bosch car care, Chennai. Work was perfect. I went there based on online reviews. So take your call.