The information about the tuner is absolutely wrong.
The Sony HD300, LG3200A, and HTL-HD are all the exact same equipment with very subtle differences. All of them on the inside actually say they are LG 3200A's.
The differences are as follows: The HTL-HD would be considered the base, moving up to the LG3200A you add an RF remote, moving up from there
with the Sony you add a fancier remote with flip lid (inside the flip is a resolution select button which allows you to switch between 480p, 720p, 1080i etc. - however since all the boxes will do the switching automatically this doesn't really have much use).
There are no other differences. Same tuners, same menu, same guide, same everything. All units can change formats (apsect modes or stretch modes) from the remote and all have the same modes. Anyone telling you differently has no idea what they are talking about.