Hi everyone,
I've recently realised that the only thing keeping me from being car-free is having to carry my guitar across town to teach every Monday afternoon (I cab it-- about 15km for around US$4). Does anyone have recommendations for good quality guitar cases that I can carry easily on a bike? I've seen cheap vinyl with backpack-style straps here, but I'm a bit concerned that they wouldn't protect the guitar at all. Any other biker-guitarists have tips? Thanks in advance!

Edit: It's a classical guitar

Edit 2: I did a forum search and found this thread: http://www.bikeforums.net/showthread.php?t=94323. There is a reference to a backpack cover for a hard guitar case, but I can't seem to find it. Anyone have any ideas? And in case you were wondering, an Xtracycle, while cool, is not an option right now.