I have the Xi2 in an 8-weight and it's a fine rod. I like the fact that it's a four-piece, and I like the action a bit better than the softer RPLXi, though don't find it to be any smoother than its predecessor. I also liked the RPLXi's braced stripping guides better than the new, low-profile jobs. It's a very capable rod, but I like the Winston Boron IIx and the Loomis GLX Crosscurrent better. The Loomis is more powerful and faster than the Sage, and the Winston has much more feel and is more enjoyable to use.
You may prefer something completely different, so try to cast it before you buy.