1. Lot of people like Ninja regulators, which are light and perform well. I have no hard data on the tanks themselves, but I'm under the impression that they've gotten slightly heavier than they used to be from 15 years ago. All that decorative gel coating and whatever doesn't come for free. Unfortunately I got rid of my expired tanks, otherwise I'd have some data to compare against. Running remote sucks anyways.
2. In that price category, I would try for a Halo Too with a XeonPB Smartguide. That will push you a little over $100 unless you go for a used Halo. But if you go used, might as well go for a Rotor. Hoppers suck anyways.
"Accuracy by aiming."
Definitely not on the A-Team.