Matt at Gore Orchids is a #1 guy. The plants I got from him were a fair price and bigger than expected.
Gone Wild Orchids is another great vendor.
DO NOT use Orchids of Los Osis. EVERY plant I have gotten from them has had some sort of problem. I am still fighing the mealies that came on some of their plants. The pill bugs and centipedes were easy enough to get rid of. The totally decomposed media on my charlesworthii (which I detected too late) on an expensive plant was totally uncalled for.
I found the same thing with Los Osos. I repot upon receipt to make sure there is no funny business - each time I have bought orchids from Osos I have found decomposed medium and the leaves of a Zygo I ordered were yellow. It has recovered but has required some intensive care.
Thanks for the recommendations - I will take a look at their sites.