Weather you take my, Utah's, or anyone else's advice, the drain pipe has to be roughed in correctly. None of them will work correctly unless it is at least close, and by that I'm talking 1/4" to 3/8" within the center of drain measurement.
So the answer is to get your drain pipe correct, then find the easiest drain connection.
I suggested lead because it is the most forgiving, but takes knowledge you probably don't have (and you admitted).
There is no easy solution to a bad rough-in in this case.
This is an example of why plumbers are paid what they are. So many people think we are overpaid because they see a shower roughed-in and say "well, anyone can glue pipes togather".
To your credit you have never said that, and we are tring to help you. I only use that as an example.
So in conclusion: I would fix the rough-in to the correct dimentions, and then use the drain Utah suggested. He's usually right. But he has an advantage because he's older. And, maybe...............just a little bit wiser then smart asses like me.