I do corporate video as well and have been (until this last project) using XDCCAM HD for the last year. We recently upgraded from 3.5 to 5.0. I can give you several reasons to upgrade. From a purely editing perspective Media Composer has finally addressed some long-standing annoyances of day to day editing:
The biggest of these is the ability of transitions to travel with segment mode editing. I can drag a clip across the timeline without losing any transitions attached to it.
I can also extend an edit to the in or out of another clip through any transition attached to the second clip. MC used to stop the extend before the transition start or end,forcing you do delete it, do the extend, and then reapply.
The third issue resolved is the abilty to edit from one sequence to another without worrying about “splitting the transition.”
Just these small improvements have been huge time and PIA savers.
I hadn’t thought much about XDCAM vs. tape until I started my current project which includes 100+ tapes in various forms of Beta and mini DV. After using clip based media for a year, going back to tape seemed like a pain as well. Yes it is important to look at media as it comes in but it is a faster process with disc-based media. It becomes a non-linear, instant access search instead of linear, and eliminates some of the timecode hassles that can complicate capturing from tape. My usual process is to link to a disc which populates the clips in a bin. I scroll through the clips I think I want and then choose what to consolidate to the hard drive.
The AMA feature is not perfect and has some annoyances of its own, but they are not as bad as having a batch capture hiccup due to pre-roll problems or timecode breaks.
Once you have been down the disc-based media road you do not want to go back, and the efficency improvements gained by a few seemingly simple fixes (There are others, but these had the biggest impact on how I work) Make the upgrade to 5.0 abolutely worth it and necessary to stay compatible with current post-production world.