I went whole hog and bought a BikeProUSA bag and am pretty happy with it. There's a couple drawbacks, namely that you have to do something with the bag once you're wherever you're going. But, depending on your plans, this isn't necessarily a problem.
The box comes with wheel bags and a gear bag and is very well padded. A metal 'post' (for lack of a better description) is built into the box...you attach your bike frame to prevent it from moving. There's plenty of room for your helmet, shoes, clothes, etc. The bag is also WHEELED, which I highly recommend. NOTE: For some reason, BikePro doesn't put a handle on the top of the bag, though they put them on all other sides. So if you order a bag, ASK them to put a top handle on the bag...makes steering a whole easier!
Good luck finding something! BikePro works for me b/c I travel with my bike for extended periods, the box gives me plenty of extra luggage space

, and it offers the best protection I've seen. Cheers!