Just to add another choice to the discussion, I have four Xi2s and love them. I would not overline them. They work fine with many of the lines already discussed, once you’ve learned to cast them. (My tendency, at first, was to apply too much power on the forward cast, which they don’t need.)
The lines that work best for me are the Wulff Saltwater Bermuda Triangle Taper lines. I have Wulff BTT floating, intermediate tip and intermediate lines and they all work well with the Xi2s, especially in situations like sight fishing for redfish where you need quick, accurate casts with minimal false casting. I’m not a long distance caster, so I don’t know how those lines would work at a distance, but they work fine for me out to 80 feet.