Got the Howard Leights, they are decent enough but get your head hot and are annoying with a cap.
Got the surefire, decent enough but found a bit of a fiddle and ache after half a day.
Got the Howard Leight Laser Lite squishys (they fit nice).
I've played CQB for years and never had anything loud enough to really need them. Before splashing loads of cash I'd check what sites you plan to play at allow, most ban the TAG stuff which can get crazy.
BFGs (quake8, oshi, etc) I've never worried about (most places ban the 12 gauge blanks, which are loud).
Strikeforce in Gloucester use some really loud disposable pyro, had one go off between my feet and it was an 'interesting' experience but even then didn't cause any issues without earpro.
If you're going somewhere new i'd suggest stick a couple packs of squishys in your bag just in case.