For starters: I live in rural Western MA with Verizon DSL (3.3 Mbps download and 0.7 upload speed). I tend to use Netflix and Amazon on my older 21" 2010 iMac and it works fine (for non-HD streaming) and some HD downloads.
My TV is a 30" 2001 HD-ready Loewe Aconda 9303, used only for DVD...