You should be OK qualifying for a conventional conforming loan - a 680 score is fine and a BK 6 years ago is a distant memory. There is no waiting period to refinance into an FHA loan or VA loan. VA might offer a better payment as there is no monthly mortgage insurance, but it does come with a VA funding fee (unless you are a disabled vet) which conventional conforming loan programs do not. I'd get with someone who does VA, FHA & conventional conforming loans so you can review all of your options.
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