Kysrium SL's ?

IF one were to upgrade ones' wheels from Kysirium SL's, what would be a consideration ?
Bearing in mind I'm a climber first an foremost. I mean would there be any benefit from putting something more aero on the back? Or should I just be going lighter ?
I await your collective esteemed wisdom.
Cheers
Bearing in mind I'm a climber first an foremost. I mean would there be any benefit from putting something more aero on the back? Or should I just be going lighter ?
I await your collective esteemed wisdom.
Cheers
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Peter
Is there a problem with they hollow spokes? I was kinda leaning towards the R-Sys
Peter