The M600 was anything but a disappointment - it was the best car I've owned by a mile. Sadly it transpired to be a prototype (Reg M600 RHD - was grey with red wheels but since resprayed blue -search on Google) I wasn't happy about this and the factory offered me my money back - which I accepted and now deeply regret. I dealt directly with the MD of Noble Automotive - Mr Peter Boutwood - who is a gentleman and quite rightly very proud of the product he has developed. I can't speak highly enough of the company but at circa £300k the M600 is a very expensive car although it does offer a truly exclusive & analogue experience like no other.
The McLaren 12C / 650s are very capable cars but lack of noise and too many electronic aids spoil it for me. Its almost too safe and you'd have to be doing prison sentence speeds to get the thrill of taming the beast under the bonnet.
Its disappointing that TVR don't have a finished car yet but also reassuring that they want to get it right. I'm sure it'll be an awesome car when it comes out.
Sadly I've never been a fan of the plus 8 styling. Everyone I speak to that's driven one (I haven't) says they're an absolute hoot and hugely rewarding to drive - I guess being 40 I'm just not old enough for one yet?