Looking for some help deciding on which batteries.....

Personally I've gone with 2 12v agm's. Costs more but lasts longer, charges quicker, does not have to be vented, virtually no maintenance except to keep then charged. I chose 12v rather than 6v because we do a lot of remote camping, 2-3 weeks at a time and if one 6v somehow goes bad I can't run anything. If one 12v goes bad I can still run on the other. 6v's can take a deeper discharge but we usually don't go below 70% anyway. Look at Lifeline or Universal Bestconverter.com