mod advice polaris x edge 600

I have a 2003 polaris x edge 600 snostuff rumble pack single pipe can that i wanna dial in better im looking at clutch mods for better acceleration an down shifting for trail performance for a rider under 150 pounds i don't really care about losing a little top end speed i was thinking mabye an epi kit? Is holtzmann atacc? a good mod ?. Are there any other good mods that don't break the bank?
thanks

mod advice polaris x edge 600