Talk to a good mortgage broker. There are considerations other than those you raise here that enter into the picture. For example, from the perspective of your credit score, the closer you are to maxing out your credit limit on a card, the harder the hit on your credit. So, it's better to owe $3,000 each on cards having a maximum limit of $10,000 than to owe $9,000 on one card having a $10,000 limit.
And check with a CPA, too. In general, though, without knowing anything about your financials (other than what you've presented here) is that it's almost always wise to replace higher interest debt with lower interest debt.
Hope that helps.