When I bought my sailfin I was also planning to buy a pbt. The owner said I did not want to do that. Told me the pbt was too aggressive and would cause problems in my tank. I figured it was money out of his pocket, so I took his word for it. The achilles is definitely one I am looking at. They had one at the LFS
a while back. I was waiting to see if it ate before I purchased it but someone came in a bought it. Achilles, yellow and chevron are 3 I am seriously considering. How old does a chevron get before it loses its color?