Right on. The STi is pretty much moded from the factory. I'd skip the intake as most can damage the engine and even the ones that maintain the proper MAF housing diameter won't help you much if at all without tuning.
Not that you're asking, but if I bought an STi, all I'd add is an adjustable rear sway and get an alignment that increases neg. camber. I think the rear sway kicks you out of the Stock class in AutoX though.
I'd probably get a custom tune for the ECU too.
Congrats on an excellent car.
