I am going to go ahead and say Turinabol, which I am planning a future stack with. Considering doing this towards the end of summer for some recomp before a winter bulk with SD.
Turinabol is priced right, is liquid so dosing is much more customizable, and liquavade. Now granted the bio availability of a methyl is already pretty good, but the way I see it, you can't have to much of a good thing. Check out jherman's log on Turinabol, he got huge with a decent cycle.
All of the feedback I have seen has led me to that direction. I am not saying anything against CEL, I happen to like them, but to me it seems that Primordial is the way to go for a hdrol clone.