Firstly, welcome mate!
You'll find this site probabaly has the most information on the U12 and U13 ATTESA outside of Japan/Thailand/Malaysia.
The U13 ATTESA's (HNU13's) are alot more commonly found in Australia than the U12 ATTESA, but share many similarities.
Regarding turbo 'lag', if your car is running the stock T25G turbo on a black-top SR20DET (is you HNU13 a series II?) then lag should not be all that bad.
Does your car have any factory options? Sunroof, airbag, heads up display?
Anyway, don't be afraid to start a new thread about your car and show us all some pics, etc etc
Enjoy antrx