Saddlebags / Seat recommendations?

Hi guys! I just purchased a 2014 Honda Shadow 750cc (I live in Asia). I'd want recommendations for a very comfortable seat for the passenger as the factory one is rather thin for the passenger, specially considering I'm coming from an older Shadow from 2000, which was much thicker. I'm even considering a Mustang seat and pay for the shipping etc all the way to my country, as I've seen it recommended as some sort of gold standard of quality seats. Any advice/suggestions on this?

Additionally, I'd like some decent large saddlebags to carry plenty of random crap. On my previous bike I had some faux leather ones for 16L (I believe "Saddlemen" brand...if that's a thing). I'm not sure how much larger I could go, or if there's typical recommendations for these, or if I should just stick to the current model and reorder...

Thanks!