Rear Deore- 36H- $26.95
https://www.amazon.com/Shimano-Deore.../dp/B00UB60P3U
Rear Deore LX- 32H- $47.87
https://www.amazon.com/Shimano-DEORE.../dp/B00963BA0G
Rear XT- 36H- $60.19
https://www.amazon.com/Shimano-XT-T7...4JM6PSM3XXTWYB
These are all 135 spacing and would all be great "budget" hubs. I would be tempted to go with the Deore at that price. Folks here could detail the differences among these three but for touring application probably nothing worth the price differential.