Basically I need gears but I want as few as possible. I prefer to keep a derailer setup as opposed to that of internal gear hubs.
The situation I am looking at is (PLEASE correct me if I am wrong) most of the 1x5/1x6 groups are mostly for basic beginners on bikes. What I'm looking at is a 1x5/1x6 set up that is wide and would be very extremely durable. Weight is NOT a concern. Durability and as few gears as possible is.
Any help would be appreciated.
 I think I would be also open to 1x7 solutions.