I would ask your agg extension office if any one in your area has had luck with pecans and what variety they have. For you the quicker the nuts mature the better. Ask if the trees are scab resistant and if they have issues with bacterial leaf scorch. The more scab resistant the better. And bacterial leaf scorch is a deal breaker, because there is no cure. The only other major thing to ask about is if this particular strain is prone to having issues with black pecan aphids, as they can really be a problem and some verities are like candy to them.