Hi, I've got or had in the past all 3 saddles you mentioned, of the 3 I prefer the Rolls,a nice classic saddle that's not to soft or hard and wears in very nicely. I didn't like the concors so much, I found the upturned tail to be quite uncomfortable and no amount of adjusting could make it right,I've got a pal who swears by them though... each to their own. I have an old turbo on my commuter, it has about a million miles on it, very comfy and sturdy, though perhaps if your "weight conscious" not the best of the 3.
really I don't think you can go wrong with any of these saddles.
Clear as mud eh!
'Rasher