i have made a little research for cars on yahoo autos and i can afford a car which is 80,000$ or less :so here is the cars++++
infiniti fx35 2009 price : $43000
porsche cayman s 2009 price: 54000$
bmw x6 2009 price : 55000$
audi q7 2009 price 42000$
porsche, the other ones you have listed are horrible cars accept for infiniti ... believe me you dont want to be living at the dealership waiting for your car to be repaired after dropping that much cash on it
i think there all good cars but i would say the bmw or the porche..idk what that other person was talking about but i have a bmw m3 right now and ive had for 4 years and there has been absolutly nothing wrong with it... and if there is they usually fix it super fast..good luck