Joined: Nov 2005
Posts: 648
Likes: 1
From: Killarney, Ireland.
Bikes: Derosa SuperKing Dura ace, DA wheels, Cannondale Topstone AL, Grx, FFWD 350. Specialized Tarmac SL7 UDi2, Sworks Crux, GRX, Ridley X-night sl, GRX, Specialised Epic Comp Carbon.
I ride the sl's, I like them a lot. But I would not upgrade to the es's unless I thrashed the sl's, they really are not much of an upgrade except for price. If you were using a lower set of that line, like aksium, I would say go for the upgrade. You can get some lighter race/climbing wheels or some aeroo wheels as has already been stated.
Good luck.