Staying NA for the time being, several people have gone the turbo route now and seeing as I can get a complete engine for £250 I'm thinking or buying one and rebuilding it. Bore and stroke it up to 2.2 or so, flow the heads, oversize valves, new cams etc. see what I can get out of it without forced induction. Doing lots of reading at the moment!
And once that's all done, take it out and put a 2.5 sti lump in with the drivetrain and have a 4wd turbo fto