A4 or A2

i am stuck between the a2 and a4, if i got the a2 i wanted to put a 1.8t motor in and get a new trans and i figured that would be pretty original and a good idea and plus the old gtis look nice, but the a4's look real nice i wouldnt have to find a 1.8t motor it would have air bags and all since my parents would like me to have airbags but i dont know what to do, could anyone tell me what you would do or think i should do