I'm taking Lemeuix. I could be wrong, but I think Lemeuix will rule the division within another year or so.
I think it's too early to take a fight with Pirog right now. Even though Lemieux is not Jacobs but GBP propably underrated Russian guy and they paid the price. David IMO should get way more experience before fight with him. However Sylvester or Zbik - David maybe would beat them even right now.
Golovkin will rule this division pretty soon. Pirog,Lemieux,N'Jikam,Lee,Guerrero are all good boxers but golovkin is a super talent,but hey thats just my opinion.
I don't care who wins, who 'can't box', etc., etc., I just want to see some great match-ups, and Pirog v Lemieux would be a great match-up.
The one who can take the better shot will win. Lemeuix is more polished than people give him credit for. He has great punching form, and has shown a wide variety of punches. The way he doubled his left hook to body and head in his last contest was beautiful, and reminiscent of a seasoned professional. Great match-up.