Hi Dan,
If the Academy 500D-kit is the same moulds as the Italeri-one, I'm affraid you're right on the fit-problems on that one. In the end it looks ok but it requires a lot of work. Interesting fact: the Italeri 500D-kit is the same as the 500D released by Tamiya!!
It's hard to say all kits of one manufacturer are better than ones from the other. Revell in my opinion has some good kits, but they also happen to sell the worst 1:72 Huey-kit ever made. The problem is there is a lot of mould-sharing between kit-manufacturers: that way you'll find exactly the same kit in different boxes.
Two kits I recently made and that I'm reasonably content about (I am one of those rare lazy modellers and hate filling up seams): the Airfix (also released by Heller) 1:72 Puma SA330 and the Italeri (also released by Esci) 1:72 UH1D.
Best advice I have read on this forum: if you're about to buy a kit and have doubts about its quality: post your question on this forum and use other modellers' experiences!
Hope this is of any help,
Good luck! Gertjan