The question isn't what you're paying month to month for your insurance. The real question is if you were stuck with a bill for $25,000, $50,000, or more for a surgery, cancer treatment or a hospital stay what's your actual cost? This number is what you should be comparing when you compare health plans. When comparing two plans look at not only what the monthly premium is, but compare using three different scenarios (or more) -- figure a year with no medical expenses, moderate medical expenses, and major medical expenses. Figure out what you'd pay and add that to the premium for the plan. Some plans will be the obvious choice under all three scenarios.
So, to make it simple let's say you're paying $100 per month for a $2400 deductible. And that plan covers you 100% after you've incurred $2400 of medical expenses. We'll also assume that this is a comprehensive plan and not a hospital/surgical, catastrophic, or otherwise stripped down plan that would severely limit your benefits. In this case your maximum risk is the deductible ($2400) and that would break down to $200/month ($2400 divided by 12). Your Total Monthly Cost for that plan would be $300/month ($100 premium + $200 to fund the potential expenses). So, if you had no expenses for the year your annual medical costs would run $1200 (just the premium), and if you had a $100,000 hospital stay your costs would be $3600 ($2400 deductible and $1200 premium).
Another way to look at this, using the same numbers, is that it would make NO sense to get an HMO or a low-deductible plan that would cost more than $300/month. I always get calls from people asking for low deductibles, but once they realize how to look at the "Total Monthly Cost" they end up with a much better plan than the one they thought they were looking for.
Finally it is more prudent to go with a comprehensive plan over a limited benefit plan. With the $100,000 hospital stay example the limited benefit plan may have a cap on the coverage leaving you with $50,000 or more of that bill to pay. And, these plans rarely save money in the monthly premium and the consumer also rarely realizes that they're NOT purchasing a comprehensive plan. Be sure you know what you have.