I believe the current situation for patients like you that are NVED (no visible evidence of disease) is that no one knows whether Sutent and the new drugs can prevent recurrance.
One argument is that they can't, because Sutent works by preventing tumours grow their own blood supply, and they won't do that until they get to a certain size, so you might as well wait until they do get to that size before going on to Sutent (and anyway, they might not be there at all, or just 'invisible' as micro-mets in your system)(and can recurr at any time, even years and years later).
I believe there are trials running to see whether Sutent can 'actively prevent' recurrance, rather than just deal with the tumours when it does.
If you want to find out more, try joining kidney-on, a very large and knowledgable mailing list (even larger and more knowledgeable than here!), on http://cancerguide.org/kofaq/
All the best, and it's great you are NVED right now! Julie.