Get one from a dealer with CPO Warranty and extended Maintainance Agreement. Read the threads for recurring issues with ZHP's --- a really good idea as being an "enthusiast" will cost $$$ for repairs and maintenance (Vanos, DISA valve, abnormal wear to camshafts, cam bearings, lifters, valve guides, etc.). If not taking the CPO/extended warranty/maintenance agreement route, better find a good and reasonable "indee" in your area.
Heard the BMW/Nissan dealer in your area (SLO) is questionable. I have avoided dealing with the outfit. I have relatives in the Los Osos area so am aware of the dealer's reputation, or the lack thereof.
Otherwise, it is a great vehicle! Mine is back with the dealer for an extended stay to find out the cause of excess oil consumption (dealer-confirmed 600 to 700 miles per quart with no signs of leakage nor burning through the exhaust). Still has not affected my affection of how the car performs. Plan to keep it inspite of its shortcomings.
PS - Should try 41 between Morro Bay and Atascadero (a piece of cake!) and, Turri Road when the cyclists are not on the road, for a nice shakedown ride.