No new places to add to the mix - well, maybe Pico but I've never been there - but a couple of factors to consider:
1 - When are you going? If a holiday or weekend with good conditions, I'd STRONGLY prefer Gore, Pico or Bromley to Stratton / Snow / Killington / Jiminy / Okemo based on significant crowd factor.
2 - Be flexible based on conditions. If conditions suck - rain, refreeze, etc., then go for bigger money snowmaking. In other words, Mt Snow/Okemo/Killington. Even if it's a weekend the crowds will be down in crap conditions, but the conditions will be better at those places than Gore. Those places deliver when it's unskiable elsewhere. So does Stratton but the terrain is kind of a snooze.
3 - Both Snow and Okemo have more than enough for a day's skiing and are easier to navigate than Killington. If you are not seeking out the biggest bumps or steepests ungroomed doubleblacks then you are probably going to be happy at Snow or Okemo and not get that much more out of Killington.
4 - If you go to Killington hook up with someone who knows their way around - maybe someone from epic or if not, read up on it here and/or find a "mountain ambassador" or whatever they call it at K. I've only been there 3 days or so I'm not much use to you other than to warn you can waste a day finding your way around or traversing from here to there.
5 - Count me in the pro-Gore camp. Steeps? Yes. Crowds? No. Glades? Yes. Twisty cruisers? Yes. Interesting layout? Yes (I like the upper mountain, forget what it's called). Views? YES - not 360 degrees like Whiteface but still "FOREVER WILD" Adirondacks: http://www.goremountain.com/mountain...774.JPG&id=607http://www.goremountain.com/mountain...036.jpg&id=528http://www.goremountain.com/mountain...283.JPG&id=509http://www.goremountain.com/mountain...491.jpg&id=257