I use disposable foam ear plugs. They are cheap, and if I loose a set its no loss whatsoever. Plus I can throw several sets under the foam in my gun cases in case I forget a pair or I run into someone else who needs them.
Given the choices I would get a Mosin nagant. They are very fun to shoot. You could spend 100 on the rifle, 200 on ammo and still have enough left for 3 or 4 mags for your G19.
steel plates, paper, old cars, tin cans, aerosol cans, skoal cans, empty shotgun shells, bowling pins, anything else that I can find laying around and manage to drag out to the range