the thing about yes is it is sort of a tale of two bands.
You have your well known yes songs like roundabout and owner of a lonely heart.
But those songs sound more like classic rock more than anything.  If you really want a change, try some yes songs that are much more unknown to the public.  Its much more sounding like prog rock.
I've seen all good people (although really well known, still a fucking dope song)
Homeworld
And you and I (which is probably my fav. song right now)
Spirit Of Survival
Tempus Fugit
- Marc