there is plenty of power for today's roads and conditions. I should read your requirements more carefully, I thought this was for YOU only, hence a 2+0 would be fine 
A used Aston (Vanquish) should not be ruled out, superb car.
For me the best (in terms of usable) 2+2 is the Maserati GranTurismo MC Stradele. Old-fashioned in many ways but ignore the tech and just drive it, and it is beautiful.