The reconditioned one should come with at least a 90-day warrantee. If it doesn't, don't buy it!
Remember, a "new" part becomes used as soon as you install it, at least with a rebuild; the parts that are subject to wear have been replaced. Unless you're a purist, my advice is to go with the rebuild.
On their death bed, nobody ever said, "Gee I wish I'd spent more time at work!"