De Tomaso Pantera, FTW!
Covers so many bases.
Agree, good choice and explains your avatar picture I guess.
My choice, not a particular model (I personally prefer the older models like the Silver Shadow but the modern "drugdealer" Phantom or new more elegant Silver Ghost would be fine too) and I'll try to explain why.
The GT-series prides itself in being a virtual car encyclopedia and emphasises being a
driving simulator foremost.
Rolls-Royce is a hugely famous and iconic brand as synonymous with the ultimate luxury car as Ferrari is synonymous (for most that is, there are many other brands ofcourse that do too) with the ultimate sports/racing cars.
Yep, it isn't a brand associated or particularly suited for racing but there are already many cars in GT5 where the same argument could apply.
Another reason is that like driving a Ferrari, Lamborghini or Aston, etc. remains limited to driving them in a videogame for me (and most others I guess), so does driving a Rolls-Royce or any horribly expensive car.
I'm not even a huge Rolls-Royce aficionado but as a petrolhead interested in a hugely eclectic variety of cars and brands I'm really curious to experience driving a Roller, even if only in a videogame.
Licensing wouldn't be that difficult I reckon being part of BMW (with BMW itself and Mini already included) and I think this iconic brand deserves to be represented.
It'll add to the variety too, not that many similar types of car (or any right now) are included although I'm sure to be in a minority when I wish for this brand to be brought in.....