Which version of Surface RT will you get?

I'm wondering which Surface tablet to get...

Surface RT 64gb with Touch Cover £599 / $699

Surface RT 32gb with Touch cover £479 / $599

Surface RT 32gb without Touch cover £399 / $499

My music collection alone will reach near 32gb, but with the push by microsoft to an increasingly cloud-connected world, would 32gb be sufficient for music, docs, apps etc.. With the introduction of Xbox music, say, would I be able to have my music stored in the cloud, freeing up space for apps - and will apps themselves require a decent amount of space?

Was wondering what peoples reasons for paying the extra £/$100 were, or peoples reasons for sticking to the 32gb version...

Also, anyone know if a 64gb version will be available without the Touch cover bundled in will be/is available?