If you won't be able to steal your wife's car when go golfing then I'd go with a M5. Being unable to bring my golf equipment with my 911 has been a problem but I have another car for golfing days. You might be able to squeeze the gold bag into the rear seat area but definitely not a cart. Sometimes I still take the 911 to driving range and folding the seat to reach for my clubs in the back isn't necessary a fun thing to do.
Must stop eating..............