[G-Sun] Design and roof

Hi! Converting my shed to a one-room-studio as described here. I've made a plan for the overall size and shape, like this:

High res: http://4.bp.blogspot.com/-7kTT9N3ZQsg/U ... e,+iso.png The roof-structure in this plan however leaves me with 6 outer-wall horizontal studs (or what is the correct name?) going through my room in the height of 2,08m. Like these:

So, Tod came up with an obvious idea, in this post, like this: Replacing my horizontal studs. And second idea, making better use of my inner roof as a bass-trap. But, then, how do I make the supporting structure for the inner roof strong enough? Hanging it in the outer roof structure with mechanical decoupling? Or, making a bridge-structure like this: And what design will give best result, regarding acoustic/isolation, ease of build, weight and cost? Thanks!