I can't speak for the other brands that you mention but I have been very happy with my ERA. It has been on the road since 1981 and I am the 6th owner of the car. At least two of the owners raced the car and I open track the car as well as drive it on the street. Customer service from ERA has been outstanding. Anything that I have ordered has been shipped promptly. The only thing that I have replaced because it wore out was a radiator expansion tank. I have given the car my personal touch by adding fuel injection, the aluminum engine compartment, ceramic coated header and side pipes, dual pusher fans and the comp dash.
Dick