Regrind Cam?

Last year I put a Comp Cams XE274 in my car and I'm not real happy with it. It has a rough idle to it, but it has 16 inches of vacuum at idle too.
Car has a 340 with Magnum heads and exhaust manifolds.I'm thinking I could install Rhoads Lifters, kinda noisy though. Or I could have the cam reground. Is that a dumb idea because of the cost? Or just live with it.