i am getting works shocks in a few days and i was wondering if i should get the at steelers with or without reserviors?what is the difference?

99 warrior
yoshimura rs-3 pipe
k&n filter,dyno jets,ac bumper,full skid,swingarm skid,and nerfs.
380 big bore w/wiseco pro light piston and wild hot cam.
shredder tires on douglas .160 rims and soon to be works shocks.