I have done the same thing in SE Texas for the same reason. I am north of Beaumont with an average in the 500 to 600. My La Feliciana is just starting to bloom. I have a White Delight 2 peach, new from Texas A&M that has been blooming for a week or two and is in full bloom. It is rated at 550. Loring is suppose to be one of the best tasting peach and has a 750 chill hour rating. I would not go above 750-800 hours. June Prince is another variety that is 650 that should work.

You might even want to go with a low variety like Florida Crest at 350-400. It is adapted and mine already has marble sized peaches. Yes, it bloomed very early but with the cold weather coming on Monday it will withstand the cold better than the varieties that are blooming. Gulf Crimson is another that has grown well and has a chill of 400 hrs. All my lower chill peach trees are in their second growing season but they should have as good of flavor as La Feliciana. Florida King has been rated as fair to poor quality. I have stayed away from it for that reason.

Arctic Star nectarine has been blooming for about a week if you want to try nectarine. I planted one last year and it grew very well.

You will also want to look at harvest dates to make sure they don't all come off at the same time. I have also planted a tropic snow and tropic beauty peach tree in 15 gallon pots that i can move if it gets cold. I hope they will last for about 5 years before they become root bound. They have a chill hour of 150 to 200 hours.

Thanks for the reply, it sounds like you are just across the great flood from where I am, I will certainly look into those varieties and am hoping for the best here for Monday. The latest forecast appears to be calling for a low of 35, I am considering trying to give the sensitive trees a bit of heat that night as a couple of degrees may make all the difference.