I hope that the wait will be worth it and your judgement will not be misplaced. I think that the R8 will meet your expectations. I also have had many Porsche's over the years and the one thing that lets them down has been the interior finish, this is an area where Audi are the master craftsman. I am sure that the performance and overall package will match up to Porsche and having a choice of two exceptional brands can only be a good thing. Remember that competition never hurts the customer, we just stand to gain moreAs a Porsche fan I know this car will be excellent even before its been built, the R8 though (I am an Audi owner too), I still have the slightest of doubts.
I think I'll go for the aftermarket Milltek exhaust. The quality is superb. For example Milltek manufactures the exhausts for Bentley, that says enough.Whilst the R8 meets my needs best at this point in time I wouldnt say it addresses all of the issues you mention. Its styling is a matter of personal taste, arguably its power to weight ratio and performance stats could be better, exhaust note? apparently subdued inside the car, R-tronic? the jurys still out but reports so far have not been excellent.