I've been a Canon shooter for ten years. I've often thought of going to the dark side. Here's my gear at the moment: Canon T1i 24-70 L (mark 1) 70-200 L 2.8 IS (mark 1) 85 1.8 Nifty Fifty 18-55 kit lens I've been saying for at least 6 or 7 years that I'm going to sell the 70-200. If I'm going to be replacing my body anyway (which I'm obviously woefully overdue) it isn't much of a jump to just sell all and start over. The only problem is that I won't be able to immediately replace everything I have with a Nikon equivalent. If I were to switch I'd likely go crop body, 7200/7500 maybe. I never use my 70-200 so I wouldn't need to necessarily replace it. But I couldn't afford to get a Nikon 24-70 right off. That would take a while to save up for. Are the non VC Tamron 17-50s good enough for modern sensors? I know they used to be great, but things have changed a lot since then. I also remember Sigman having a nice DX 30mm prime, has it held up well? And more importantly am I going to hate using third party lenses after I've used primarily L lenses for so long? I've been out of the hobby for a few years now and I'm trying to play catch up on all the new stuff.