Hi Lanny - As the proud owner of the September drawing Sage 99, I can tell you this - GET ONE!
I've only had it out once so far due to a crazy work schedule change, but I plan on a full report once I get to really put it through it's paces. So far, I'm most impressed! And yes, I picked the 4wt.
One thing I can say so far - it's a whole lot more than just a nymphing rod.