Considering that a full-auto Uzi would be illegal.....I wouldn't recommend getting one.
Hence the semi-auto.
Uzis are some of the least accurate POS's you can get. They're just bullet sprayers, don't expect to hit much from very far away.
If you want personal protection, sure a .45 is better. But for dumping lead downrange for fun, a 9mm is a lot cheaper to shoot.
If you really wanna have fun, get yourself an AR-15. Shoots damn fast, the barrels can usually take a lot of abuse, they're accurate, and not too expensive to shoot (altho can be pricey to buy). There's just something fun about emptying clip after clip and still hitting your target with every shot....800 rounds later, time to go home.
b