I used a Rossignol. I'm certain it was the TrickStick 158cm mid-wide.
That's very different from something like the hot knife. Good boards that are under $400 that would be as easy to handle as the Trickstick would be somethig like the
GNU carbon credit
My concern would be learning on a full rocker or catch free type board and then wanting to switch to something with more camber or all camber. It might be quicker to learn on a full camber board like most everyone that has been snowboarding for 5+ years has done, and then decide if you want to go hybrid or not.
So on that note maybe a hot knife would be better for you since it has a lot more camber, but don't expect to be able to ride it like you did the rossiginal right away.