The extra tax works out at €2.55 a day over what you have.This is just a thought but if you're willing to spend that sort of money on a car, why not buy the Impreza in the uk, even after vrt, you'll probably save over buying it here so negates the tax difference. Then when you want rid, give it back to the garage in the UK and claim a vrt refund while selling it for way more than it would be worth here.
I know the tax seems ridiculous but in comparison to the cost price of the car, its not really (speaking in local irish terms, not international value for money). I'm paying €1500 a year for a 10 year old A6 sure, now that's ridiculous!!