Welcome James. I made the same upgrade from an ST just before Xmas.
Strangely, I only put window stickers on that but I already have a new knob, static LED indicator units, a sharks fin aerial and bonnet catch cover for the RS!
I might even start to get serious after the next planned tyre and wheel upgrade as I was listening to different exhausts on YouTube the other day ðŸ¤ðŸ¤£
MG no mods but flaps and a lovely new RS knob