For value due to undeniable quality, longevity (stainless steel), sound and no requirement to re-pack baffles, my vote goes to Staintunes.
This subject is always a difficult one and very much subjective. For my vote the difference in cost between the thunderbikes and the staintunes wasn't that much last time I looked so personally I don't see the value for money in them.
They do sound good on the sound bytes I have heard though and like the staintunes, appear to be tuned to our bikes.
