Boosting and tuning a 2gnt i can understand. It's good for people on a budget and aren't willing to pay out the ass for a gst outright only to replace most of the turbo system anyway. Then there's the possibility of having your crankshaft get up and walk away on you. Nothing like replacing/fixing the block or swapping in a 6 bolt eh?
But yeah, for the money it should cost for that conversion, you could have bought two 1g gsx's or a 2g gsx/tsi awd with a 6 bolt swap. The beauty of it is you can keep your 2gnt FWD and have a really cool 4g63 powered awd car too. 2 dsms ARE better than 1.
If you have a big bank account or won the lotto and/or feel like challenging yourself.....ignore this completely and do it anyway.