Awesome to hear you like them. The Prima QD's/spray wax are by far some of the best IMO. They're the only ones I use. Hydro will offer some insane beading! Just wait till you see it. Plus Slick offers some protection as well and it beads too.
Slick is not required for Hydro but you can certainly use them together. Hydro or Slick are both great as drying aids. Hydro offers quite long lasting protection/gloss/shine/depth especially from a spray wax.
I usually use ONR then Amigo if needed BG then Hydro. I also use Hydro as a QD each time after driving my car. I also have Slick and love that too. I think Hydro is probably the most underated product there is, it is verstile. I also think its light years ahead of OCW. Right now i am using Prima Hydroseal its an awesome product. Now I usually do ONR then spritz with regular hydro and apply Hydroseal, looks are awesome and so far durability is really good. i really don't care too much about durability as i enjoy detaining my car weekly or daily if driven. Hydro & Hydroseal are perfect for me , I thought about the perm coatings ,but realized they are not for me. I really don't think at this point anything will look better then Hydro/Hydroseal for me.
Hydro and Slick have been of my favorite products . The nice thing about Hydro is that the gloss is better the next day . Haven't tried the new Hydro seal and Wash yet . But they are on my list .
can't wait to see how mine works out, i have 4 coats of glanz wax on my wife's car......so it will be a great top off.