RE: Apple or Pear trees?
In 06, planted Yates Apples and Kieffer Pears, (some hard mast as well)all are doing well. They took off this year with the bareroots finally getting established and fertilized them this year as well. Ordered them from "The Wildlife Group" I ordered from Coldstream and Oikos in 07 & 08, various apple and pears (plums, dogwoodsand hard mast), they are also doing well.
Just placed an order from a new company, Adams County Nursery in PA. Very good selection of soft mast trees. Just placed an order for apples, pears, peaches, plums, cherry and appricots. Now I ordered these more for the wife, (however the wildlife will benefit as well), ordered various trees to mature at different times through the summer/fall.
So, if I was you I would order 10 of each. Can't go wrong, just reasearch to ensure they grow in the proper zone and are able to self pollinize or you may need to order two variety of apple/pears to cross pollinate each other.
Good luck.