This fellow seemed like a nice guy on the phone and certainly has long experience. You might ask him. I got some nice, good sized, pear plants from him a few years ago.

http://www.bobwellsnursery.com/

And Texas A&M gives some regional suggestions.

http://aggie-horticulture.tamu.edu/extension/fruit/pear/pear.html

like you, i planted a half dozen types 2 years ago. the bare roots are doing better than the potted ones. but its too early to say which is better, no fruit yet, about the same growth

Pears in central Texas? Now your speaking my language! Can you tell us were exactly in c. tex you are located? Off the cuff I would love to see you add Moonglow, I think it is my best pear now. Depending on exactly were you are Ayers may not get enough chill to be regularly productive, it has not been for me in the Austin area( six years only one bloom and crop). If you like them the Asian pears have been exellent for me. I like Hosui and Chojuro. I have also done well with 20th century though some years it may get fireblight I'm told. Fan-stil is a good pear when ripened properly and is definately better than kieffer. I actually like orient and they are good for processing.

Ok, on another note I must say I have a word of warning about Bob Wells. Nice people and they sell big healthy plants but I have found that most of the trees I planted from them have turned out to be mislabled. Nothing is more frustrating than babying a fruit tree waiting for that first piece of deliciuos fruit only to find out that it is something else less desirable. My advice find a more reliable source.

Thanks,
Scaper

Hope this helps,
Scaper