The XPs are great casting rods. The 490 and 590 seem to have a strong following, but were a little too fast for my taste. You know, different strokes.... To me, the 590 doesn't start to come alive until at least 40' of line is out. I really like the new, more moderate 590 ZXL, and would encourage you to cast one if you are looking for a 5 line trout rod.
The one XP that I love and own is the shortest one, the 476. It's fast, but has a very fine tip that allows for tippet protection down to 7x, but generates enough line speed to throw bigger bugs. Too bad it's not one of the models being revived.