Boyesen dual stage made a nice improvement on my basically stock blaster (FMF Fatty, airbox cover removed). It's confusing which ones are which, Pro, Power, etc....There are three different ones IIRC. I got the dual stage ones and I like them. As mentioned above, they're not best for every condition, but I think they are good for what I do....mostly make use of the full power band, not just keep it up high or down low like you would for a certain type of race specific built blaster. Fiberglass and carbon fiber single stage reeds have their place too.
Heck, I'm not even sure the dual stage reeds are the best for the way I use my blaster, but I figured they're a compromise of sorts, and I'm happy with them!