24.99-34.99 is a cheap 'guess'timate, wishful thinking. Given the focus MS has on overpricing attachments and peripherals and the bundled headset it should cost even more.
In that case I'd want a HUD to keep my TV screen clear. Instead of providing you with another heaset it should have a full fledged HUD attachment. (640*360 resolution, with visualizers for music, achievement and Live contact toasts, and video streams from Live Vision cameras of people you're talking to.)
If that is my 360 was functional so I could benefit either way.. *cry.