Nice Romanian there. That'* about the best actual AK you can get, the Galil and Valmet can't really be called AKs anymore. Hit www.aimsurplus.com
for ammo, they have mil-surp stuff for about the cheapest you can find. Good company too.
For a real self defense, think .45 like Will said. I have a Springfield XD Tactical in .45ACP:
About the same price as a Glock, and in my opinion, a better pistol. 13+1 rounds, great grips, cleaning is a breeze, and I usually make a ragged 2inch circle at 15 yards. Not the most concealable piece in the world though.
My other self defense pieces:
The rifle is an early model M44 Mosin Nagant. 5 rounds of steel-core 180gr. 7.62x54R, the bayonet is 12 inches long, and the entire rifle is possibly the best blunt instrument in the history of head contusions.
The other is Rover, a 2 year old cat. When people knock on the door, he hides in the cabinet where the cat food is.