Go for continuing in a 737 ... GA is something like the current McCarthy era in Europe. You are the bad one, the snobby one, the far-too-rich one, the jealoused and slaughtered one when the revolution comes ...
What about doing a real checklist for your need, then list the requirements following and look for what is left? Like: Europe, fun&business, affordable etc etc ... go for Jet-A1 as Autofuel most probably is not in that performance range, what noise and night restrictions apply for the airfields wanted, short field needed (thing of hot&high in Switzerland) ... My guess - you will end up in a pretty short list and if browsing for planes available on the market starts, I bet there are less then half a dozen machines to look at.