The Sabian 18" B8X Medium Crash Cymbal is a nice go-to crash, creating a loud and bright accent to any hit. You'll probably want to use this as a 'low crash' supplemented with a 'high crash'.
Sabian B8X Cymbals superior to B8 cymbals in every way, but they're priced at exactly the same level! For the same amount of money, you get cymbals with more hammering (including on the bell) and an adjusted profile. In non-geek speak, that means more complexity of sound and louder volume.
