I am in exactly the same shoes you are in Abruzzi. I am planning on purchasing a line at the end of the year. And also, because of the same reasons, am a bit frightened off by the high fuel and insurance prices.
My mum used to own a 2000 model celica and I can say that they are a fun car to drive. I am yet to sit in the cockpit of a skyline, but can say that I don't think you can really compare them. I was also thinking of buying the celica of my mum, but didnt, purely because of the fact that they are still seen as a "hairdresser's car", plus the fact that i want a factory turbo car.
Let me know what you decide to purchase.
My 2c.
Gus.