Others could speak from experience, but from what I think I've learned on this forum is that it's not necessarily cost effective to do the rebuild unless you can do it yourself. But if so.. for your needs, it seems like you aren't better off with a vdrive. The Saltaire option is cool - I don't think it would handle as well as your Sunsport, but if it's a better break even point to get the upgrades that you need, I would be open to it.