there are alot of good synthetic oils out there. I'm a Castrol distributer; I know it is a good synthetic oil, also Mobil 1 is very good. Redline and Royal Purple are also very good synthetic oils. As far as oil filters are concerned, stay away from Fram filters. I see vehicles come in my shop on a regular basis with fram filters and complaining and sudden drops in oil pressure. We pull off the filters, usually finding that the filter is actually starting to fall apart, piece by piece. Trust me on this, stay away from Fram.
Also, using synthetic oil after 1000 miles is not going to cause problems with the rings or any of that crap. It is actually recomended by many motor companies, oil companies and 1000's of mechanics all over the world.