It all depends on what you are doing with the rod...
I own a 796 XP and can not wait to get my hands on the 896-3 RPLXi. The 796 XP is a dream to cast and fishes a dry line like no other rod but when throwing larger flies or more wind resistant flies, the light tip seems to lack the power (the same light tip that makes the XP such a pleasure a cast). This is where the 'Xi' is going to come into play for larger saltwater flies or when throwing big strike indicators and such for steelies. Plus the 'Xi' comes with two oversized stripping guides and a hidden hook keeper.
The XP is lighter then the 'Xi' and eventhough the ligh tip doesnt seem to handle large flies for me as well as I would like, it throws a 350 grain sinktip with ease.
But I am speaking based upon experiences with the #7's and #8's and not the #10 so take my advice with a grain of salt...
And do yourself a HUGE favor...stop by a reputible shop and cast both rods and only then will you really know which rod is right for you.
Ryan S. Petzold
aka Sparkey and/or Special