Just make sure you know what youre getting into.
Heres some facts people often dont think about with high power mods:
1) They are unusable with carts, as they will fry the cart filling
2) They require you to drip manually very often - and i do mean very often
3) 98% of all highpower modifications out there could be potentially dangerous since they dont have cutoff or any other secure mechanisms built in, so if the
batteries start to melt down, or if the switch gets activated for too long without you knowing it... you could have a problem - a big problem

4) Your atomizers are not built for higher than 3.7 volt ( peaking at 4.2/4.4 ) - and you are likely to kill them fast - if you are new to it, replace fast with faster!
Now, im not saying all this to scare you off, but i think most people here knows what its like to be relatively new to e-cigs - and highpower mods can be really cool. However, if you are into e-cigarettes to give up on analog cigarettes, then my best suggestion to you is find a good 3.7 volter + a liquid you love, and only get a highpower mod "on the side" to test it out.
Oh and, the eGo has a higher peak ratio for a sustained time, making it more powerful than the dura, and giving warmer / better taste than the dura - you could call it highpowered, but its more of a nuance than a step up - but it is feelable, definately.
Anyways, just thought you should know =)
/Mik