The_Pickle,
There are a lot of specs involved here. Was there something you were looking for that we could narrow it down a little?
--HDTech
Do you have any literate that compairs the 3 models? The 3600 is finally on Samsung's website, but, still no manuals. Nothing on the 4600 except for the CES news release.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic