From my very limited experience of Amel I think an early decision might be around a 12v or 24 v system. We bought a Santorin with the 12v system and an additional prop shaft alternator ( which works very well when sailing). But we don't have a genset. But we don't have a freezer, air con, washing machine either. We love the SM 2000 which has all of these, but our way of cruising is fine without them and we anted a 14m boat.
So check out with the family what equipment you want to cruise with or without - I am guessing then that any that you listed will be more than adequate for the job. The build and engineering is pretty bulletproof.

Ian and Linda SN 96 Ocean Hobo