ORIGINAL: stump3r
I have the Xtreme 180's and love them, Goldslinger pretty much covered everything there is to say about them. The only thing I can add is go to a higher C rated lipo to get the most out of your new motors. They fly great with the stock lipo however you will really notice the performance when you give them more juice!
I'll jump in here with my support of this statement. I just received a set of DN 15C 850 mAH packs and the increase in power in VERY noticable with the X180 motors. I have another set coming, hopefully today, for my older CX2.
The new packs do better on stock motors too, but with the X180 motors, you can really tell.