The other posibility would be to use a digital SLR equipped with video. I haven't tried it yet at EPCOT, but I have had success shooting with my Nikon D-5100 with the focus set on infinity with a telephoto lens that allows me to change the zoom without losing focus beyond what miniscule adjustments I need to make manually (Nikon DSLRs disable the autofocus when in "live" mode shooting video). The only problem with this setup is that I can't put the camera on a tripod to get good, clean zooms, so I lose the ability to shoot stills while simultaneously shooting video.
As far as locations, I've always been partial to the Japan pavillion because of the framing the arch provides. However, I've seen the shows from all of the typical spots around the lagoon, and they all have advantages and disadvantages. The only issue that will never be solved with shooting loction is that the globe will always look tiny in any shot unless you're deliberately zooming into it.
That's assuming you A. have the time to shoot more than once and B. feel like editing it. If both conditions apply, I'd recommend shooting one entire run through in a wide shot, then doing it the second time remembering to move in on the globe and maybe point the camera up for the last few minutes to have tighter shots of the fireworks.
I had the benefit of a pretty solid miniDV camera that maintained focus for 80 percent of the wide shot. Unfortunately, I didn't study the footage to realize that I needed to get the closer shot of the globe.
As a reference, here's the video I shot (and forgive me for the quality - it was five years ago on last-gen gear): link
Walt Disney World's Magic Kingdom
Disney's Animal Kingdom
Disney's Hollywood Studios
Disney California Adventure
Universal Studios Florida
Universal's Islands of Adventure
Universal Studios Hollywood