I've ordered a Milltek exhaust, Carbonio airbox, and after extensive reading of the posts on this forum will be getting a Revo map to finish things off.
....Sounds familiar!

Which Milltek?
The Carbonio won't make much noticeable difference without also having the Milltek and the remap.
I can very strongly recommend Jim at JKM Portsmouth as a Revo tuner who knows his onions and will give you excellent personal service (as will Kate). They're not the closest but worth the journey in my opinion. A small family business of true enthusiasts.
My advice would be to get to know the car as it is for a couple of thousand miles before modding, or at least before remapping.