Take the bird in the hand rather than the Roth in the bush.
Consider that the money you save on health insurance costs by having a lower MAGI will compound over the next 20 or more years so even if you have to pay tax on the gains, you probably will be well ahead of the Roth conversion you would have done.
We could pay about $5,000 more a year for medical insurance and convert maybe $10,000 to a Roth. That is $5,000 that is gone, poof, no chance for those dollars to work for you. Yes the Roth might grow to $30,000 by the time you pull it out tax free, but the $5,000 will have grown to $15,000. Add that to the $30,000 you have in the traditional IRA and you are at $45,000. Even paying 25% on that and you are better off than the tax free Roth by nearly $4,000.