If you plan on using that ammo in a defensive role, its good to run as much as you can, or feel comfortable with, through the gun.
If all you are doing is plinking, there is no reason to get the hollow point ammo. Get some FMJ. If you look around online, you can find 9mm around $10-12 a box of 50, and 40S&W $12-14 for a box of 50.
If you got the Hollow point ammo at that price point... go for it.