Seeking Solution for Big Music Collection

I have a music collection of about 100GB and am looking for a nice way to organise all of this when I get a new laptop (prob a 13" MBA). I would prefer not to have all of my music on the machine, as it would clog the HD, but I want it to be readily available so I can easily Dropbox stuff or create playlists. iTunes match looks like a pretty good option, but I'm not sure how well cloud solutions integrate with iTunes in terms of creating playlists. Can a Time Capsule be synched with iTunes? If so, that could be an option. Help would be greatly appreciated