biff,
Sorry you do not appear to have had a fast response. Personally I've always had quick responses to queries.
The problem may be the DCR HC44 is a new camcorder therefor few people will currently have it.
Both the HC44 and 46 are currently available in the Sony range. The HC44 was I believe a replacement for the DCR HC42, which has just been dropped from the Sony range.
I had to make a similar choice recently as for a short time both the 42 and 44 were available and could see little difference between the 42 and 44. The main difference was connectivety. The 42 had more options particularly as I wanted to transfer from old Hi8 to the computer and this can be done via the 42, but the rest of the specs were very similar. I therefore bought the 42.
I have found this to be an excellent camcorder and would highly recommend it. I would imagine the 44 will be the same. If connectivety is an issue for you then you may still be able to pick up a 42. I find the low light use fine, I use it indoors for family stuff. However I always think an additional light is a good idea if you do a lot of indoor shooting. If you do a forum search on the HC42 or Sony camcorders and low light there has been recent discussion of Sony camcorders and their low light performance. Several different views, but I found it compares well to others in the price range and i'm happy enough.
As for differences between the 44 and 46, all that I can see is that the 46 has DV in, the 44 does not. You can find all the details on the Sony website including the 42 if you do a search for it.
LINKS for the 42
http://www.sony.co.uk/view/ShowProdu...ory=CAM+MiniDV
44
http://www.sony.co.uk/view/ShowProdu...ory=CAM+MiniDV
46
http://www.sony.co.uk/view/ShowProdu...ory=CAM+MiniDV