i no 7years is a long time thats why i think im just going to get the ideal from fiat and then see if in 4years i still wont the the car
Bear in mind though that with I-deal, you do not own the car until it's completely paid off. You're only financing about 60% of the cars value. You'll need to pay the remainder at the end of the 4 years in a lump sum before the car is owned by you.
I only mention this as you wanted to modify the car, which would be a bad idea if you're going to hand the car back after the 4 years.