Thanks Luc, when I was 17 I was a named driver on mums insurance, so I have been driving for 5 years without crashing and I have 2 years no claims bonus (this is my third year on my own quote). I believe on my 1.2 corsa my insurance was around 350 mark, so I think 620 does seem ok for a 2.0 st.
I am probably not going to save, I will get a bank loan of around 6k or 4k depending on how fast I could sell my current car. All I want to know is that the new job is going to be stable before I get the loan

payments of around 200 a month for a nicer car for 2 years - I can live with that easily lol.
And thanks for your opinion on the extra features, I really would like to know what people think. For example, if you have heated seats in your fiesta, is it worth getting?