Hi I have the Dakine Bag/Case and may be interested in selling (great bag but limited space at home causing issues).
Chose it as like you I decided it offered a great compromise of protection. It is very easy to wheel around and very stable. Only downfall is narrow doors or luggage trolley width restrictions.
Absoloute zero damage to bike on both legs (but granted I spent a lot of time packing it).
Compared with my friends simple padded bag the amount of swearing induced on a Cardiff – Calgary trip was at a ratio of around 1:1,000!
Only used once for that trip, e-mail me if you are interested (address in profile).
keppoch.