Well, it very well may be a full-blown achilles, and I might just be nuts!
but I did recall seeing a couple pictures of hybrids with the orange spot(indicating achilles genetics were stronger in that specimen). I guess just the seemingly more brown portion on the front of yours and the dorsal and anal fins looking a little different than most achillies i've seen is what gave me the thought.
As Christy and Chin said though, beautiful fish!
Chris