Alan,
I too wanted to invest in the factory reman but it was unavailable for my plane. When I talked to Air Power they told me that Lycoming has a 36 year rule in effect now. If your engine is 36 years old or older they will no longer take it in trade. They did offer to rebuild mine. With that in mind I elected for an overhaul to new limits with new cylinders from Custom Airmotive. They quoted $24,000 with all new accessories but I had everything but the engine done last year so they deducted $2,500 for the accessories and now looking at $21,500.
Dan