And, if you can't afford those, just get some orange foam ones - they have excellent protection, often greater than the audiophile ones, and, let's be honest, that bar or arena you're going to wasn't built with sound quality in mind.
Personally, also at the very cheap end, I like wax ones partly because you can vary the noise blocking as needed - put them in loosely or squish them in.
I guess that depends on the metal show, because I wholeheartedly disagree. But except kanonenfieber currently, I like little that is close to mainstream.
