I don’t consider myself a collector in the sense that I will accumulate camera bodies and lenses for the sole purpose of owning them. All cameras I’ve ever bought have been acquired with a specific purpose in mind. I still own most of them, while some have been replaced by other equipment that suited my needs better. Rangefinders, SLRs, panoramic cameras, medium format… they all have their pros and cons and do not necessarily yield the same pictures. They certainly force me to see things differently and I think this can only benefit one’s photography. To be able to choose a specific camera and lens combination for a specific photograph is a luxury I would have a hard time giving up. By ‘luxury’ I mean that they are not essential to my photography, but it gives me pleasure and comfort using them. I appreciate cameras for their intrinsic qualities, the same as I appreciate classic watches, cars etc. Does that make me a collector? I don’t think so. I use all my cameras on a regular basis and regard them as tools to get the photograph I want. If I were faced with the choice you express, I guess I could use only one, but it would also restrict me.
So to vote in this poll is a bit difficult, but I understand where you’re heading and if faced with the choice, I’d rather have one camera and keep photographing.