A Rev Box is a Rev Box, Right?

[Sjorge450R]

I have been pricing +1000rpm rev boxes and found multiple brands for many different prices. I found one called a black box for $55 and Ricks Electric for $75 and a Big Gun for $129. Does it really matter. They all claim to raise RPMs from 750-1000. Help me out... I want to get this quick. Im already hitting my limiter to fast.
Steve

[bradley300]

for 75 bucks, you can send your stock cdi to gthunder and get ride of the rev limiter all together

[Sjorge450R]

i dont want to get rid of the limiter i only want to get a +1000 so that way there is a lower chance of blowing up my moter.

[trict_out]

i got a ricks electric and i have no complaints about it. Its a 1000 rpm box and i think it helps in keeping me from rapin the rev limiter every time i hone on it.