Now that my current lens needs have been fulfilled and I have gotten most of my lens envy under control, my focus is now on upgrading the supporting equipment for the times where hand-holding is not feasible or doable (say, for those super long exposures, or for shots that should be focused manually).

For quick and simple support, I have an Induro carbon fiber monopod with deployable metal legs. The monopod works quite well with my Nikon AF-S 70-200mm f/2.8G VR II (and that's the shortened version of its official name) or when I don't want to lug around my tripod and ballhead. As far as my current tripod and ballhead, I have a Manfrotto 055XPROB tripod and a Manfrotto 488RC4 ballhead.