the Xi2 is very nice. It is NOT a "club". It is more akin to the XP than the Xi, with a little more grunt. What everyone has said is similar to my experience.
I would say that the Xi2 has a very possitive feel, and I think I would prefer it to the Xi for almost anything. I haven't cast the 11 weight and the Xi 11 is brilliant for tarpon.
The XP is nice too, but in a wind, or with bigger flies, the Xi2 has got it beat. The XP nine would do well in almost any flats condition.
The Xi of course would be on sale, and the 5pc is a very easy, powerful rod.
One cast can change your day...maybe your life.