When I am trying new shorts out, I usually get the first pair at an LBS with return policy - even if they have been worn. REI I believe also will take them back no matter what, as long as they are clean. I'll pay more when trying something if I have to, to be able to return it.

Once I know I like something, then I'll look here for it.

Regarding Chamois - I like a thinner one. PIs seem too thick to me. Sugoi's Ultrafino are nice, as are the Castelli pro Donnas or something like that.

V.