I’d love to see a viable 3rd party emerge as well, but I feel it has to start at the local level and build a solid foundation first. Perot, Nader, Barr, etc...have been joke campaigns, with no realistic shot at even making a marginal splash in the polls.
Imagine a new conservative party that could get a dozen or so House seats and 2-3 in the Senate. Certainly not enough to legislate independently, but more than enough to exert pressure on the Republicans to toe the line, and the party will grow and grow from there.
that's how it could end up if the movement starts now.