Just to sum up what Colin wrote, here's what you get Devils wise from the two companies:
MSG - HD - for free
MSG+ - HD - for free
MSG+2 (overflow) - Probably the worst SD feed in the history of TV. Looks like old hockey footage from the 80's
Versus - HD - for free
Basically, with Cablevision, they provide all the Devils games in HD, IF they don't have anything else more important going on. If there is a Rangers, Islanders and Devils game on, the Davils always gets the overflow (which stinks). Even basketball gets precedence over Devils hockey, but never Rangers or Islanders. That's Dolan for ya...
MSG - HD (I believe with the Sports Package but Colin would know better)
MSG + - SD but a very good SD
MSG+2 - SD
Versus - HD, Standard.
So, if you go with Cablevision, you are able see every Devils game, 90% of which are in HD. not exactly the "every game of every local sports team in HD" nonsence they advertise, but close enough.
**Edited to reflect Colin's clarification**
Edited by Bulletproof, 08 June 2009 - 04:01 PM.