There are a couple of threads about flowering quince. They are beautiful when with flowers! You can ask those guys about fruits.
enter link description here
I will try to graft a couple of quince branches on pear, I do not want to have the whole quince tree. I think if quince is grown in the Southern part of Russia, it can be grown in Nebraska too. I like the idea of high pectin content in quince, so I can add it to various jams and quince marmalade sounds very attractive. But you are right that a flowering quince will be a lot easier to grow.