Yes, go schwalbe! (although I'd put a ralph on the front too, unless it was particularly loose or muddy. But then again, that's me - nic's are a perfectly fast tyre, and they do grip better)
Edit: To qualify that somewhat mindless comment, schwalbes are easily my favourite racing tyre. Quite subjectively, I think they roll considerably faster than any other knobby I've tried (which were mainly 'race' tyres - pythons, crossmarks etc), and the new triple compound tyres grip very well as well. Regarding the rolling resistance, they seem to have a particularly thin, flexible casing (that is, sidewalls/tread less the knobs), and as rolling resistance is nearly all from flexing the rubber I believe this is a reason they are so fast rolling.
However this also makes them poor riding around tyres, again in my opinion, as they are expensive, soft and thin/fragile. Fine if you don't mind spending lots of money, I guess.