Turnbased is ok, but most people are skeptical unless you are playing DnD. Also there is the potential for people to become butthurt over said turn based combat. But I wouldn't be too worried about it given how mature our group is.

On the other hand I could see turn based taking away from the RP for some. But the evidence is in the pudding and we won't know how it turns out until we try.

I think though that the GM doesn't want to worry about more than he has too.