My legs are so important. I just bought the best of everything and didn't even think twice. I considered it insurance. And it worked, I crashed good on my left and pinned my foot under the bike and banged my knee. Got up and kept riding. Not sore st all the next day.
To a point, or they wouldn't be protective. I wouldn't say mine are comfy to walk in, but I can waddle about. I have sidi crossfire 3