After seven Summits i made the same decision. Newer get used to how gen4 handles on varying snow. Engine is top notch for sure. Next year Matryx Khaos.I'm going to try the Poo Matryx next winter. Have been on two Gen4s and while there's nothing wrong with a them, a lot is left to be desired in technical terrain with the Gen4 chasis. So I'm ready to try something different. Maybe I'll be back to Doo when the Gen5 returns!