in general most waxes won't last you past a few weeks. pinnacle is nice, but more pricey then mothers or meguiers which you can get at any store.
it really depends on a few items.
1) how much you car about shine
2) how often you want to wsah/wax
3)budget
check the product reviews for pictures and info on how long items last. Personally, I've been using Mothers on my white daily driver that's outside all the time too. It works fine, but the shine fades after 1 or 2 weeks, at which point I'm usually washing anyway.
It's cheap and protects well. Smell is kinda offensive IMO.