If you want a car with more power, don't bother with an SC, go for a more modern turbo'ed car. Use it to get it out of your system and then every time you come back to the NA and chuck it into a corner, it will put a smile on your face the turbo simply can't compare with. You will find the turbo addictive and want to keep both though!
Mine is an SC Auto but that's a different beast altogether, the torque is what makes it fun rather than the power, and I can definitely agree with what Wiso has to say about handling in an SC, the auto makes it worse!
I wouldn't call the SC a powerful car at all. It just makes the AW11 feel like a bit bigger and lazier car than what it should be. I still like what I ended up with though, but the thought of an NA screamer crosses my mind more often than I'd admit. My wallet simply doesn't agree though so I doubt I'll ever get an NA adub.
Your car looks very fresh and mint still. If it doesn't have any rust (or very little), I'd hold onto it if I were you. 20v Blacktop swap would be the ultimate swap I think.
If you have to get an SC, keep the NA for a while before you decide which you would rather have in the long term.