Go with the recommended sizing. If you're borderline, go with the smaller size. They stretch out over time and now I can yank them up pretty high. If you're looking to get rebound, buy the SBDs and size down
My $50 Oster is finally showing signs of slowing down after 4yrs of chopping up ice and frozen bananas. If that's the worst I'm throwing in there, any point in getting something nicer or just buy another $50 blender?