i see all three of these valves advertised, all at different costs, what is the difference in end performance between them? has anyone have experience with them all can reasonably compare them?

 

My brother and I bought our Banshees new in '92, and since then we've been adding mods but keeping them pretty much identical. The only major difference is our reeds. I forked out the $180 for the FMF ram valve, and he opted for the Boyesen dual stage reeds for $35 (until he could afford FMFs). I MAY have gained some top end only. He gained a noticeable increase in low end grunt. I would like to hear from a Delta owner, but between these two, my brother made the wiser decision. (note - just for a reference point, our other mods include Toomeys, porting, and milled head)