Help me out here? what are the main differences? Would one be preferable to another (taking looks out of the equation)?

Edit: or Fulcrum Racing 3s?

Thanks

Whats the darkside ?

I'm a bit of a shimano wheel fanboy, thay are lighter/cheeper than comparable wheel (i.e. a lighter wheels is much much more expensive) and stiffness is definately adequate, even when I was 'fit' I tipped the scales at 85kg and rode my r-550's day in day out and after an intitial half turn on the drive side rear spokes ot stiffen the wheel up a bit and alter the dish slightly they were perfect.

Definately a climbers rather than a sprinter or time trial wheel, but theyr still very good.

RS80's are very, very, very good. Not tried the Fulcrums I'm afraid.

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How are people finding getting hold of spokes for these wheels?
I had some RS20's (I think), a spoke got stripped so I had to shop around for ages trying to get hold of a new one. A new spoke eventually cost me 8 quid, then we found the nipple had been stripped too. Aaah, you want a nipple as well? The 8 quid spoke didn't come with one. So I had to shop round for a special nipple as well, another 2 quid.

I went for the RS80s in the end. Bargain from merlin. Thanks all.