The debate between wet cell and AGM is certainly a worthwhile discussion. But I have 2 hangups about the optima brand. 1), for a house bank, they have the lowest Ah to $$$ ratio. So poor value for a house bank compared to other same sized wet cell and other AGM. 2) in a house bank setup where you might need to rely on shore charging to replenish the battery, the optima needs a different charge profile compared to other AGM and wet cells. In the above scenario, one might end up with 2 chargers, where as a single 2-bank on-board charger would do the job. One for the existing wet cell, one for the optima.