In June, I bought a fully-loaded 2006 Land Cruiser for $800 over the dealer invoice (or approx. $7,200 off MSRP). I had to have it shipped from LA to SF. It cost around $350 for that distance. I bought the truck through a car buying service, Cartelligent, so they arranged the shipping company, etc.
Not sure if that's apple-to-apples, but given the sustained high gasoline prices, I venture to guess you have more bargaining power now than ever before.
I'd try to get the Texas dealer to match the out of state price, or at least match + $500 to them (b/c of the hassle factor of buying from out of state).
That being said, aren't there sales tax savings if you bought from out of state? Might be worth it then to buy from out of state?