Welcome to Texas!
I like some of the folks at Boutique Petshop in Dallas on Garland Road, BUT the owner does not guarantee the saltwater livestock! However the only reason I continue to go is that there are a couple of saltwater guys who are a hoot, and will be truthful on what is what.
Also, you may try Fish Gallery in Dallas I believe it is on Greenville. It is nice, not as high as North Dallas, but the people will also be truthful with you, and guide you in the right direction. The website (mentioned earlier), is a good one, and I have been told if you become a member there are a lot of perks...(haven't became one yet myself, but will get to it when time permits).
Personally, I did not like Plano pets, I wouldn't buy anything there. Even if they gave me something free...(sorry to negative, but why waste a trip!?)
If I think of anymore I will let you know!
Congrats on your move, hope you love it here!