Christopher
Had a bit of a chuckle. Yami to Doo. Sounds VERY familiar.
If I remember a quote from Carl Kuster.....the whole intent behind the XM/T3 was ridability.....the ability ot enjoy riding all day long....and that's what you'll notice most moving to the G4!!
I did the Nytro to XM switch in 14 and loved the change. I'm 52 and definitely appreciated the extention to my riding day that comes with the Summits.
I still kept my Nytro. It's not much heavier (I fixed most of that) but in the end I couldn't say good bye to the engine/powerband. In our riding area there are many times that the 4S torque is simply more fun to ride, albiet a shorter day cause it DEFINITELY takes more effort.
So you may miss a little of the Yami, but overall it will feel like a giant leap forward.
You and the boys will definitely enjoy!
OTM