Budget wise, Ammaco do a nice looking twin top frameset. Most of the others are becoming more and more desirable so are beginning to fetch more money i.e Haro, Dp, Torker Freestylist etc.
It all depends on your budget buddy and what you want it for. If it's a carpet queen and a keeper, try and pick up something a little out of the ordinary. If it's a rider, just keep looking and something will come up.
Hope that helps a little