I have 3 of them in 3000/4000 sizes and love them. Smooth and light and great for all day casting. The 3000 matched with a loomis E6X medium 7 foot 8-14 pound rod is the best spinning combo I've ever owned. Pricey combo but well worth it.
That is the exact combination I am contemplating going with.
I have both the 2500 FK and the new Ci4 3000. I like em both. I've haven't used the previous models so it's hard for me to compare em. But their both light (especially the 3000 Ci4!), which wont tire my arm/forearm from casting thousands time my topwaters.