100 watt Solar decision

After dedicating serious time looking around for batteries, I feel like out of accessibility interstate batteries might be the winner. Lots of people don't like shipping batteries, probably because they have heavy lead in them? Anyways, I live in a rural area and even I have a store that's an "interstate dealer" near me. But the terminals look a lil different than all of the other ones I've been looking at, surely they are still compatible with everything. Right?

Interstate 6v "Extreme Cycle" Battery


And Pianotuna, why are you so interested in getting those SiO2 Batteries?