I was considering converting my mountain bike to SS. I'm wondering how well chain tensioners work for mountain biking and which one is best. I am considering three possibilities for the conversion on the rear:

1) Screw on freewheel type rear hub + chain tensioner
2) Screw on freewheel type rear hub + new frame that accepts eccentric bottom bracket
3) White Ind eccentric rear hub + disc brake bracket

Seems #1 would be the cheapest option, although probably not the best. Thoughts?