id build my own if i were you.. peice it together.. but since you dont know jack shit.. id do a ton of research first.. skip some of the forums first or check out a d-series.org forum.. learn how turbos work and whats effective and not effective.. remember turbo'd motors arent as reliable as n/a and require much more maintenance.. also rememeber that tuning is everything.. its the make it or break it of any turbo'd engine... getting a shitty tune or no tune it all, will only burn a hole in your pocket and give you tons of headache.. and dont expect it to be a walk in the park either...ecspecially being your first turbo setup...
do you plan to DIY? or have a shop take care of it.. in that case, do more research for a very well known shop/tuners..
"if you dont have enough money to throw your car off a cliff and walk away without giving a shit, then you dont have money for boost"
edit: what kind of d-series do you have btw