Many sites only do air to 3000psi however tournaments etc go to 4500 and you would appreciate the extra capacity, plus a 4500 1.1 is lighter than a 3000psi 0.8 steel.why would you regret buying a 3000psi bottle i am thinking of buying a 3000psi in the future as my site dont go up to 4500 psi they only do 3000 i think.
jason