Based on your "handle" you might be a physician. If so, your score is too low to qualify for a "Physicians" loan that could get you into a house with 5% down and no pmi. You would receive a significant "hit" to your rate in trying to do a 30 yr. fixed Conventional loan. Your score isn't high enough to do a Jumbo loan. I'm not sure, but I would think that you are probably looking at a loan amount over $271,050, the FHA limit in Dallas, which your credit score should qualify you to do. Don't be fooled by the low rate - by the time the mortgage insurance is added in, you are, in essence, paying at an effective rate about 1.50% higher than your note rate.
My suggestion is to speak with a lender, consider doing a 15 yr. Conventionsl mortgage, as long as the loan amount isn't over $417,000, but the loan officer, whoever you choose, should be able to look at your overall situation and tell you what you can qualify for.
Feel free to call me if you have any questions, 972-705-2806, or call Tom Burris. I think we are both honest mortgage loan officers and will be honest with you.