i know i'm abit late. but i'm getting the battery grip. i've leaning towards canon 1.
anyone can tell me the pros and cons between phottix 1 (which i see many have) and canon 1. price not a concern, build and quality is what matters.
Try reading this site: http://cheesycam.com/?p=1176/
It does a review with a side by side comparison to the original Canon BG-E8 battery grip with Photti BP-550.
Personally, why I bought 3rd party product mainly because of $$$. Many a time, after using a product for a while, I will "upgrade" and notices that I actually spend a lot on those original accessories where other 3rd parties function the same.