There are great hybrid rockers out there, otherwise known as CRC, which are good at both. This is a good choice if you want a single board that works in all conditions.
For me it's either pure camber or RCR (better performance in pow). Don't like the loose feel of rocker/CRC for bombing groomers. Camber under feet is more precise for that purpose IMO. Mothership is quite a nice board if you like to ride fast and hit pow.