I completely agree with this idea
It would be really nice if we could save builds since i use 2 separate builds for pve/dungeons and wvw , especialy since my wvw build is really bad in pve.
Would also be nice if this includes utility skills/weapons/armor/etc.
So you could completely switch between 2 builds
That it costs some silver is not so much of a problem imo.
They could do it simulair to the town clothing in the Hero menu just a button that allows swithing between 2 (or more ) builds