Can't really help with where to go in invers but.....
How much do you want to spend ?
Is the car under warranty ?
If you have a bit of cash lying around to spice things up a bit a full exhaust system including new downpipe would be the go. That and replace the factory panel filter with a K&N or something else good quality.
Pod filters only work well on these if they are fed ALOT of cold air, as with any car really.
Personally i wouldn't play with the boost as you will find the new exhaust system will jump the boost up 1psi mabey 2.
Have a search through here and you will find its not uncommon for these to go pop if they run 18+ psi daily and don't get good fuel etc. 98octane is your friend if its avail in invers
Mine has similar done to whats above and tbo its got enough guts as it is.
If you wanted to go further a better turbo, front mount (factory top mount heatsoaks bad) and new exhaust manifold would go down a treat.
Apart from that. Go the Wags!!!!
