My idea to way build nice S1:
-EA Circuit wheels to match S1's "aero" look in budget
-Rival set to cut weight and add quality
-Rotor seat, cut weight and add real bike look.
7,95kg w/o bottle cages and pedals. 6,7kg with light wheels in same condition.

King Cage Iris's are nice....
As usual, this is always first step.....