Well the FX is going to be the more comfortable car. It's probably better for you space wise. And it will probably have the best "look" for you if your clients ever see you with your car. I don't know what type of photography you do, but let's say you were shooting a wedding... you're going to look a lot more professional driving the FX35 than you would with the MS3.
Never say never, Justin BEAVER will never allow you to say never. Of course you are going to afford one broski. You are going to be get one so fly with them turbos on