Funny, the review on MSRs site said the Jetboil could not boil water in a 7MPH wind, can only be used with the Jebboil pots, and took 10 minutes to boil at 9'F (all wrong in years of experience with my Jetboil). One thing I like about the JB is using an MSR or Snowpeakpot with it, or rewarming a beverage directly over the flame.
At least the other site correctly said it COULD boil in an 8MPH wind.
I might sound biased, but I am also a fan of MSR, and use their Pocket Rocket when I don't want to lug the packed volume of the JB. And the JB is right at the limit of weight for something I might or might not toss in my pack for dayhikes.
The Reactor looks like the best option in the world for melting snow. But is the few minutes of time saved worth more than twice the cost, +6oz of weight, and loss of capability of using other pots? Probably not for me. And a critical flaw IMO, the Reactor burner does not attach to the pot so it can not be suspended in an alpine tent, easily held or served while heating, etc..