There is a lot to said about closing your eyes and picking one, as long as you are starting with the right ingredients ie; Dame and Sire , pedigrees, Etc. Etc..
Personally I have purchased two on line, the first one was a Pointer from Arizona I went on pedigree alone and she was a total flop and I re homed her. The second one was my Poodle last year from Oklahoma after swearing I would never do it again. I got exactly what I wanted and more. With that being said I have seen more culls sent across the US then good dogs bought by my clients on line.
I hope you get exactly what you want as well, Good luck with your new pup!!