SCRAP that stupid side button design the G600 has, take a look at the Naga 2014, it took what little improvements the G600 had over the Naga/Naga 2012 and blew it out of the water.
But regarding the scroll wheel related issues, I'm not really sure if the scroll encoder used on this mouse is really the
TTC 1230020000000 mechanical wheel encoder as it appears to be, or a cheap
Kailh knockoff, but lately Razer has been using some really low quality components due to their partnership with
Kailh. Sooner or later, they're bound to release some "Razer" branded switches for mice to replace the OMRONs, which will be just rebranded
Kailh switches and that's when we will all know that they've hit the rock bottom.
I'm not a fan of the build quality, either. I can set aside that complaint though if it just works. Is the issue you're referring to the glue oozing out of the right side? Yeah, that's a pretty big deal in my opinion. Doesn't the Naga get warm? How's the temp after prolonged use on the G600?
The G600 and Naga 2014 don't get warm at all after some time. Now, the Old Naga Molten...
Those LEDs really overheat...