Rymeister - I went a little crazy with UPO a couple years back - its an amazing watch so i dont think i was the only one. Anyways - I had two frankens and now own the gen. One had taka double A/R and while amazing improvement over stock, considering the work you have already done on the watch - i would have to recommend getting the gen crystal. You kinda have to see things in person to compare as photos will not capture the difference.
I would say that if you already have a UPO that has upgraded double A/R on it then it is not worth going gen. But if you are currently at stock crystal it makes most sense to go straight to gen.
I would also highly recommend putting it on a new black isofrane strap!!! It is much better than the gen rubber IMHO.