Bare essentials??
You can't have it both ways; you said that Aston servicing would be more than £1000 per year. It's not, it's nearly half, and would probably be half again from an indy.
Plus the GTR looks like it was designed with a ruler. Sure, if you want big numbers and license losing speed, I'm sure it's great. But it can't even be remotely compared to the aesthetics of an Aston or a Maserati, looking at the Maser, it just makes me yearn for one, irrespective of it's numbers and faults, I'd forgive it.
I can't say I look at a GTR in the same way. I just looks and think, wow thats fast, and thats it.