The devil would be in the trigger option details.
I'm not confident that Lieberman or Snowe won't fall for some inevitable trigger.
Snowe has already said she's in favor of the trigger.
To me, the trigger is the biggest danger. Because no genuine reform will happen, health costs won't fall. Thus, the trigger (public option) will be put in place.
The left doesn't like the trigger because it doesn't provide a public option immediately, but independents will likely be fooled if it passes. Independents will think that Obama has succeeded in getting health reform passed and his favorables will likely go up. And the worst news of all it that in a few years we may very well get socialized medicine triggered.