roll-bar reccomendations?

So after reading the roll-bar thread, it looks like I should probably do a 
couple things on my bugeye:

Soften up my rear springs
Add a matched set of front and rear anti roll-bars.

I currently have a 'stock' front bar off a '78 midget, so I expect that it will 
have to be upgraded.
So what size bars do you guys recommend for a street car? I want something that 
will be good on winding mountain roads. And where is the best place to get 
them, 
at a resonable price?

 - Bryan