I owned Cayenne turbos and currently have the 13 GTS, let me tell you something
The E92 feels like a pure track car when you hop from a truck, but the truck with a nice engine like the 4.5 V8 i have in my GTS, gives you that tank feel. it's a good feeling, plus it's quick enough. X5M will be fun, trust me. Get the Pannno roof it's deff worth it.