Personally, the only polling outfit that seems to be reliable-on a consistent basis-is the bipartisan one operated by Celinda Lake and Ed Goeas.
You mean the "Battleground Poll," which is a collaboration of Lake/Goeas, the Democratic company, and Tarrance, the Republicans. They only publish national polls, and they seem in the mainstream as far as accuracy. The movement in their polls also seems quite credible. And they are great on methodology.