Well, I'm slightly biased of course, but you could do a lot worse than the R8. Ticks a lot of boxes, very comfortable cruiser, epic carrying capacity and that sound.
30k is a nice round figure though, have you considered:
TVR T350? http://www.pistonheads.com/sales/2838818.htm
Corvette C6? http://www.pistonheads.com/sales/2892040.htm