I'm a fairly experienced stills photographer, but I'm very new to video. I just love the creative opportunities the 7D platform makes possible. I've now shot video with the 7D a few times, and it's clear to me that I need to add some equipment if I'm going to produce good work, or to take my skills to the next level. I'm going to leave audio accessories out of the mix for the time being (for basics, I have the Rode stereo videomic).

First and foremost, I need to be able to do critical focusing. So, at the top of the list is the Zacuto Z-finder (I've got one on order). I have a decent tripod, but need to add a video head. Beyond that, it seems there is a ton of equipment which could be purchased, but I'm wondering if there is a correct "order" of purchasing items for someone who is just learning the art? Here is my current (ordered) list:

1. Zacuto Z-Finder
2. Video Head (need recomendations)
3. ????, $$$
4. ????, $$$
5. ????, $$$ ...

Would love to see input on this "ordered list." Thanks in advance for any advice!