I've been tempted by the idea of selling my X100T (which I love) and upgrading to an X100F. This, with the teleconverter would cover 80% of my shooting needs. That said, for a while now I've had this fantasy of moving away from the m43 system (my EM5II, while a good camera, just doesn't inspire me to pick it up and shoot the way the X100T does) and just shooting with an X100 series camera, the teleconverter and an X-mount body with the 56mm F1.2. The idea of just 35mm, 50mm and 85mm equivalent focal lengths is very appealing to me. I know the AF speed on the 56mm isn't the fastest and I do find that the AF on my X100T can be frustrating at times with candid shots, resulting in me using the 'shutter mash' technique more than I'd care to. I have no issue with the IQ, menu system, or lack of features (ACROS, limited video capabilities) of the 16MP X-Trans II cameras, but am wondering if there is compelling reason to go for the XT20 over the XT10 if I'm only planning on getting the 56mm lens. I know there are significant improvements to the AF system on the X-Trans III cameras, but do those made a noticeable difference with the AF speed and/or accuracy with the 56mm? If not, I'd probably be happy with the XT10 and saving the extra cash as they drop in price or are available for less on the used market.