When I was on holidays in Poland few weeks ago I was thinking about getting 055CX3 which is exactly same as 055XB but carbon fibre. It is lighter and can take more weight. Very helpful when trekking, but decided against it.
I think I got too attached to the one I have now. It's been through a lot and I only have it couple of years.
Ball head is amazing, so easy to adjust to what you want. I also have 3-way 804RC2, but am only using it for strobist work as its bit more precise.
I'll probably get a cf 055 at some point soon, only a little bit heavier than the 190 series but can handle the weight of long (500mm) lenses.