I'd like to try band in a box. I would love to make great-sounding backing tracks for rock, pop, jazz to play along with. I use macs. I don't see myself performing with these, just using them in my private teaching business. I have a studio above me garage , and another mac in the main house. Be great to be able to use 2 computers but I don't think that is allowed. I could carry the hard drive back and forth i guess. So i have 2 questions : one, which version? I don't need state of the art performance sounds and options, just great backing track sounds that are easy to create. And hard drive or download? Thank you very much for any input