Jason,
Lot's use just latex, but from my experience a true end grain sealer would be the way to go. Just keep in mind if you split the logs in half and remove the pith, you have less cracking going on as well. When sealing a whole log, just coat the ends, and any exposed limb take offs. When sealing a split log, coat the ends then come around the corner about an inch or so on to the now exposed face grain as well. If they are good size logs, splitting them in half will speed your dry time drastically.
As for bradford pear, I love turning it. I find that it can have some good characteristics buried inside. It may look a little bland or tan in color when first turn, but usually darkens up well within 6 months. Nothing beats free wood.
_________________
Life's short, turn fast!
Dave