I used Tony back in 1998...maroon metallic on my 289 FIA car...it is on the ERA site in the customer pictures and the 427/289 differences page.
http://www.erareplicas.com/differ/index.htm
It was great then, it still is.
In 98' it was $3500...really very reasonable price...with almost 10 years passed...????...to hear the price is only up to 4500, a real bargain for prep and paint.
Keep in mind, all the painters recommended by ERA are totally familiar with the body prep for any of the cars...427, 289, or GT-40 and that has to result in some economy in the body prep a higher level of finish for the price.
I am sure they all have different overhead and timelines, but you will be just fine with any of them I bet.
Pete