don't want to burst your bubble, but swaps always sound so simple before you start...then the delays, cost overruns and complications set in.
you should be aware that doing a swap is NOT a trivial undertaking. you need to be prepared to either pay someone else a couple thousand $$$ to do it, or....
have the tools, garage space, patience and know-how to do it yourself. have the connections to suss out a setup (basic engineering skills) and scrounge parts in a timely and cost-effective manner. then have another car to drive for a month or two while your 2.2 is getting its turbo transplant (not something that is likely to happen in a couple of weekend days, you know)
just bolting on a turbo is the least of your worries. substantial power upgrades require additinal cooling upgrades. more power requires a stronger clutch, more brakes and better suspension, etc etc etc. before you know it, you've been working on the car for months and spending $$$ like mad and it's STILL not ready.
bottom line is, unless you are able and willing to undergo a highly experimental procedure on your subaru, if you want a faster car, sell the one you have and get a used WRX.
OTOH, tinkering with scooby swaps and upgrades and stuff is some ppl'ls favorite sport!
Dave G