On my 20 im running the elevate kit on my 165 . Boy is it ever playful for me for being a 165 . Saying that i have always been a longer track guy for the reason you can think a little bit more when pulling lines. I had the 154 snowchecked but changed it and went with es on my 165. I cant agree with what has been said already . Shocks make or break this machine , spend a day trying different pressures and see what works and what doesnt. Being said the extra weight with the es you can easily shave off with a lightweight battery, can and you lose 15 - 20 lbs right there. The 165 is nice because you arent full tilt constantly vs a 154. I havent had any issues with mine this year and its ran like a dream. 500 kms with no issues and im running clutch kit, y pipe, can and the rest are all personal preference mods such as elevate, running boards, bumpers etc. I would highly recommend the elevate kit as the machine tends to float much nicer and not want to dive as soon as you let off the throttle. Im running the altitude power sports clutch setup with a custom helix, stiffer secondary and adjustable weights and makes a huge difference . I decided against a pipe because then you are playing with a pc5 and all that jazz with can cause major headaches. I have the mc so i have the air shocks and no complaints with them at all once you set them you dont look back, other than checking them to make sure you are still where you set them . Like many others are saying try both and see what works best for you and what you want!