A Surly Ogre is a great choice for a E-Bike Conversion.

A good write up of a build of a Surly Ogre is found at The Monkey Lab!   

They have great ideas for inspiration. 

Add a BAFANG 750W BBS02 MID DRIVE EBIKE MOTOR KIT to this set up and it would make a great long distance tour bike...  

Build details

Frame: Surly Ogre 4130 CroMoly steel
Fork: Surly Ogre 4130 CroMoly steel
Headset: Cane Creek 40
Stem: Salsa Pro Moto
Handlebar: Jeff Jones Loop Bar
Shifter: Rohloff
Grips: Ergon GP1 for Rohloff
Seatpost: Salsa Pro Moto
Saddle: Selle Anatomica Titanico
Front Hub: White Industries MI6
Rear hub: Rohloff SPEEDHUB 500/14
Spokes: Sapim Force
Nipples: Sapim Brass
Rims: Salsa Gordo
Tires: Schwalbe Big Apple
Front Skewer: Shimano XT
Cranks and Bottom Bracket: Surly Mr. Whirly
Chainring: Surly Stainless Steel
Chain: Wippermann Connex 8sX
Brakes: Avid BB7 with Speed Dial 7 levers and Jagwire Ripcord housing
Rack: Surly Nice
Fenders: Planet Bike Cascadia

http://cyclemonkeylab.blogspot.com/2012/01/rohloff-equipped-surly-ogre-29ertouring.html#more