The SLR is a fine saddle from what I have heard. I'm getting myself the Flite TransAm Titanium, although Selle have just released the Flite Gelflow (same as the TransAm but just with gel).
I switched to SLR a couple of months ago after using Flites and Flite Genuine Gel for 10 years. I find SLR more comfortable and have ridden for up to 4 hours on it. It does not suit everyone, but if you are right shape you get a very comfortable and lightweight saddle.