Walter & Moonshine are about the best modern responsive yoyos. The AntiYo YWET with silicone in both response grooves and a heavy lubed bearing is another of my favorites. There are 2 slim titanium pocket yoyos coming out that both are designed to be used with a slim bearing also, I’m going to grab one of them.
Walter though is really the one you want to look for, designed to be a modern responsive yoyo. It’s hard to find these days though.
While not out yet, Spencer’s next yoyo “Theodore” is in the works, there were a few serial numbers available to reserve still. https://spencerberry.com/theodore/ If you’re looking for a modern responsive you may want to get a spot in the reservation.