I am thinking of selling the FE 55z to help purchase the FE 1635z. My reasoning is that while the 55 is basically flawless, it is still just a fast 50. I also have the Canon FD 50 1.4. From what I read, at one time that was considered flawless. Well, my copy is still close to flawless all these years later. So would I really miss the 55? I don't think I would. However, I am really missing a UWA. So am I crazy?