Thanks for the replies, I'll be picking the yellow up next weekend. I like the fact that the ORA assessors (tank bred) are about 1/2 the price of the wild caught.
As for the tank the 2 will hopefully share after QT, 75 gallon with 100 lbs of rock (lots of caves and overhangs). Tankmates... Blue assessor, green mandarin, masked shrimp goby (sans shrimp, the pistol went nuts and had to go), tailspot blenny, blue-gold blenny (they get along well) and a helfrichi FF.
It's a real passive mix so hopefully adding the aggressive yellow last will work in my favor.
Thanks again for the advice