As an exhaust, it will save a few pounds, and should hold up very well to heat and corrosion if its built with good material, and built well. I've seen some Ti car exhausts that used crap material and weren't built to well that fell apart after a couple hundred miles. If I was in the market and had the coin, I'd do it. My RC came with an Akra slip-on, but if it was stock when I bought it, I'd have Satos on order.
I'm not familiar with the weight of the stock system vs. the various aftermarket systems, but if the price isn't too far off, I'd go for Ti. My bike came with slip-on Akras though, so I'm leaving well enough alone for now.