Vintage Buggies; which will you suggest for racing/runner

[optiman]

I am toying with the idea of getting a vintage buggy just for racing/runner. It does not need to be the perfect vintage machine and or difficult/costly to get spares.
All I need is something I can enjoy while not having the stress of worrying about where or how much it will cost getting spares.
In the other hand will not want to get a POC of a buggy I dont know of or handles too bad.

I was concidering the Tamiya The Frog, always wanted one but never had one nor seen one in action. I've had friends with Beetles and Blackfoots(I assembled them all for them zillion of years ago) and remener them having fun without any hassles. Is the front suspension too bad?
Others I might concider;
Avante
Optima

What would you suggest? Pros & Cons?