I'm no pro, but I tend to trust sponsors to create tours that best sell a site.
I've only recently begun to build my own tours, and only for sites which I think need something better then what's available - after careful observation, I know a bit more about what my traffic is looking for... I think... still far too early for me to make any judgements.
Unless you think you have that intimate knowledge about what a surfer is looking for, building a tour is probably a lot of effort to put into something for little return. You're probably better off figuring out how to get people to the tour first.
EDIT:
Oh yeah, and SE traffic doesn't mean squat if ya can't sell anyway.
