Common wisdom usually says to go with improved glass first. Here's my bet: While the lenses you list do offer some improvements over what you currently have it is not a quantum leap. You will rather quickly realize that you haven't gained as much as you would have with the 7DII, which, in many ways, is a quantum leap above the T3i. I had a T3i and currently have a 7DII. The T3i is a good camera but the only thing I miss from it is the articulating screen. Once you see what the 7DII can do you won't look back. Besides, going with the 7DII first will give you a better idea of what lenses will work best for you. You might decide that none of the ones you listed will be what you want. As others have stated, don't be afraid of factory refurbs. They're good as new. Others have also mentioned that you should just ignore your GAS attack and do this, that, or something else. My take on it is that I don't know your financial situation and it's none of my business anyway. It's your money. Your photography. Do what you think is best.