New Boat Electrical Set-Up

[Sabbatical II]

I am currently about 33% of the way through getting a semi-custom 42' cruising yacht built at Newcastle. I intend to use it on some long passages and would want to be able to anchor out as much as possible. The engine ordered is a 75hp Yanmar with twin alternators, 1 X 80 amp & 1 X 130 amp. With 1100 litres water tankage and valves to direct deck water into storage, I am hoping not to need a watermaker. I am OK with only being able to have A/C & microwave on shore power. I am trying to follow the KISS principal and not build in unecessary complication. Is it practical to hava a completely 12 volt boat (plus shore power) or do I have to run an inverter? I would love to hear suggestions from experienced cruisers. I definately don't want a generator. Thanks in advance.