Good luck on your move. Such a production to move that far, but you'll doubtless do fine. I just don't know if I could move from warm to less warm again. I recently moved to Tennessee from Indiana and now that it's getting on toward winter, I'm sure some of the Tennesseans think I'm nuts to sit outside at work and smoke and eat lunch. They just don't get the temperatures here that we got there -- like days of 0 or lower.
I've only been to Dallas once and thought it was beautiful, but my sister and her husband live in Wiley (a Dallas suburb) and breed Saint Bernards there. They've been there for a long time and I've never heard any whispers of them wanting to return to the north.
I hope you enjoy MS.