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@TotalShanner
tldr: just get the cheap ones
Rotors are rotors tbh...
Stick with the the entry level sram centreline or the 105/slx level shimano equivalent.
High end stuff like xtr/dura-ace have fancy manufacturing processes that claim to give better heat heat dissipation but its tiny gains really.
I use centreline rotors, albeit massive 220mm rotors, on my mtb and they stop me fine.
I have really fancy 160mm sram rotors on my road bike and cheaper ones on my gravel bike, virtually no discernible difference in performance. fwiw I'm 102kg right now and they slow me down the way they should!
edit - don't pay £33 to wiggle!
I think the ones on ebay are just very old stock