I am in the market for a CPO vehicle and have narrowed it down to 2 sedans. The Pana S (non-hybrid, turbo 6 - 420hp) and M6 Grand Coupe (4.4L turbo 8, 560hp). I have had 2 Porsche's in the past and have enjoyed them tremendously. This will be my wives daily driver and will be getting about 15k miles/ year. they are both 23-26k miles and 63-66k asking price. Both have about 2 years left on their CPO warranties. The Pana is in my preferred color. I haven't owned a BMW in 15 years. It seems the BMW depreciates much faster. I could aso get a 650 GC, that would be a closer comparison to the Pana S, but can't find the right one for sale. My wife is very picky on color. Any advise?