Yes, this is exactly a Ford vs. Chevy thing. Get what you want.
One thing I like about the AR is that there are A LOT of magazines availabe, and parts are really easy to find.
What would be a "Porsche" rifle? I'd say an AR-50. Precision-built for a single purpose.
Ferrari? Barret.
Bugatti Veyron? Dillon Aero.