I received the notice a while ago as well. For mine, I was able to keep it for another year before it is canceled completely.

There are different levels of insurance in the market place - starting with Bronze (I think) and going up to Platinum. The better the coverage, the higher the level, and of course price. They should all include preventive care and coverage for things like heart attacks and cancer - your level depends on how much of a deductible you will have and your total coverage.

It will likely be more expensive than what you're paying right now unless your income is low enough to qualify for tax rebates.