IMO:
the best, when you plan to buy one GEN expensive watch ( in particular way when you buy one so different and particular case watch ), is to buy before the REP.
Rumors seed the right rep is coming.
This get you the change to get one extensive wear test on you!!
This for two reasons:
1- you'll be sure that that case caliber and wearing is perfect for you.
2- You have not the fear to spent money for the GEN now, and you'll take all the time to find the best offer and right offer for that watch .
3- If you do not like the REP or you'll buy the GEN, you can always sell the REP !
I do not know about what you do guys,
but this procedure let me the change with an affordable price, to chose the perfect GEN for me.
I some cases , after have tested wear the rep I discovered that the gen was not for me, in other cases I bought the GEN with the safe that it was perfect for me .