All of these run in the $100 to $200 range. I have all the ones you mentioned. Jupiter-3 for fast, Canon 50/1.8 for sharpest but more neutral in character, and Summar for low-contrast, older look. Of all of them, the J-3 uses 40.5mm filters, easiest to find UV/IR filters. Canon uses 40mm filters, you need to get a step-up ring. I use a 43mm step-up. Summar- uses 34mm filters.