Hi AJ,
I did a post on here when i did my alignment and put the result print out if you want to search.
I'm east Yorkshire and the main branch of Bush tyres have quite an expensive laser alignment machine that quite accurate but you will have to take the settings you want as the machine wont have the one listed and think different set up to the STi.
I had to get some camber bolts though for the back as thing think the Subaru fitment isn't adjustable? or mine at least didn't have them fitted. About £20 on ebay. You can then set the rear camber to what you like for fast road.
Sure paid about £80. Slip the guy a few extra quid and ask to spend time getting spot on and not just to the tolerance!