Best but expensive: POC Receptor, Sweet Rambler
Midrange good value: Giro shiv, Smith holt,
Cheap single impact: RED HiFi, TSG fly,
there are tons of others, but these are a few off the top of my head, all comply with the same safety regulations, except the POC and Sweet are Type B, the rest are only Type C.
hope that helps!
Gave up tech nines for big lines...
100k M4, i 5p33xz 1337