I would have to say that the Dye throtle air tanks are the best! Over crossfires nitro ducks, the dye tanks just are better, better air flow and a more simple design as well as light weight.
actually, dye's tanks have the slowest recharge rate of any modern tank on the market, crossfire and mac dev make some of the fastest, and mac dev's is the lightest
I have a dye throttle and a crossfire and I have to admit the crossfire does have a faster recharge rate. I have never had a problem with my Dye tank so I can't say the crossfire is that much better but I will say this...You pay through the nose for Dye products!!
I've got a Crossfire and my cousins both have Pure Energy tanks. We've all been pretty happy with them. I think my CF has a slightly faster recharge & a better guage but they aren't complaining about their PE tanks so i won't :P.