last week i went to the gibson dealership at KL, the wong fatt shop.
they sell those gibson style machine head.it cost like almost 300RM for a set.
i had it mine like yours of changing the grover machine heads for the gibson gotoh.
bt the man who runs the shop was freaking nice and explaining everything abt changing the machine heads to the gibson gotoh.
it's not really worth it if you're in for the looks.grover got the good tuning grip.
if you were to change it, maybe the gibson gotoh won't really fit the hole in your epi and have to make slight adjustment to the headstock(make a bigger hole,etc).
so it the end i just stick with the grover machine heads.