It's a bit spendy but look at the Lenovo Yoga 13. I have one. It's a laptop or tablet with a x64 processor running Windows 8.1 with 215gb ssd and 8gb of ram. I have the full biab and realband plus other music software running on it. While not quite a desktop substitute it is working fine as my only computer right now and it works nicely on a music stand at gigs.