Thanks so much David for your in-depth reply -- just the kind of info I need! I checked out the web site of gamma ray digital and will give them a call soon. It's a bonus that you recommend a place in the Boston area -- I like being able to drop off the film in person. I haven't had any film transferred in the last year and a half, so the concept of 2K scanners is somewhat new to me. I take it that there is 2K worth of info downrezzed to 1080P. (or in the case of mymovietransfer, 5K???)
Also, thanks Chris for pointing me to videofilmsolutions -- my films from the 1970s are VERY scratched so the wetgate may help here. As always, it all comes down to money -- I'm getting partial funding for a small documentary that uses the film footage, but most of the money I'm spending comes out of my not very deep pockets...