I rate mods in 3 basic categories...
1. Things that make the quad safer or handle better... Nerf bars, steering damper, good bumper, tires, shocks... etc., etc.
2. Things that make the quad preform better... Big 3, tires, shocks, steering damper.
3. Bling... Stuff that just makes the quad look good. (Low priority)
Further mods are a matter of choice... but I'd recommend mods that make the quad safer and then mods that make it preform better. You'll notice there are some mods that are in #1 AND #2... These are mods that I'd put at the top because will make the quad handle better AND preform better. JMO
roadkill