There is no such thing as "good, cheap"
Not trying to sound like a jerk but you have a 700 dollar phone in your hands why cheap out over 15 bucks? If 15 bucks is really going to put a hurt on your wallet maybe you shouldn't have ran out and bought yourself a iPhone 5.
$100 cases don't offer any more protection than a $15 case cannot offer.
I merely just want to know which type of case is the most protective and if I can find good types of cases that I like.