I owned a TR4A engined +4 4 seater in the late 1960s and have just bought my second Morgan, a 3 Wheeler new in December 2012 so maybe I am quite well placed to offer you advice
For sheer fun there is nothing to beat the M3W and if you are based in Southern California you will get to use it more than here in snowy England. It is also well built and will start every time and you can customise it to exactly your own colour and finish preferences
The +4 looks a great investment car and you will enjoy driving her and it will be a more flexible choice for weekends away and commuting
Therefore if your head rules go for the +4 but if it's your heart then the M3W
