Going 16v and need some advice

I am going to do the following and what would be my best option:

Amps include: 6 - SAZ-3500's on 16v should be around 30k watts

Have 2 XS 2400's under the hood and will power a SAX-100.4, SAX-50.4, SAX-125.2


Option 1: 3 - Alts on 16v and 1 - alt running 12v and running 10 D1600's

Option 2: 4 - 16v Alts and running 2 stepdown modules and 8 D1600's

Vehicle is more of a show piece than a daily driver, but does get driven once in a while other than going to shows. My only concern is having all 16v alts running stepdowns and something happening and the 16v frying my 12v electrical. Do I really need to have this concern running option #2? Any advice would be greatly appreciated.
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I would definatly have a dedicated alt for 12volt Then seperate 16 volt alts thats what we have done on the chevy