I've never used the Cranks Bros, but have used MTB based Shimano SPD, road based Ultegra SPD-SL's as well as the Look A3.1. I like the SPD's, but on long rides I have had hot spots, but using shoes I can walk around in is nice and I don't have to worry about bringing covers with me. I was never comfortable with the SPD-SL's as I had a hard time locking in. The Look A3.1's have been fantastic, but I do have to carry cleat covers so I don't tear my cleats up if I need to walk around. The A3.1 use the Look Delta cleat, which was replaced with the KEO model. I have ridden on the Keo pedals by Look and they are sweet.
I think it all depends on what type of riding you are going to do and what kind of cash you are looking to layout.
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Brian | 2023 Trek Domane SLR 7 AXS | 2023 Trek CheckPoint SL 7 AXS | 2016 Trek Emonda ALR | 2022 Trek FX Sport 5
you should learn to embrace change, and mock it's failings every step of the way.