All three use C-sized bearings. This is good.
Now, you state you are new. Trust me on this, looking to swap out bearings and/or response pads will not do much to improve sleep times. Only time and experience and practice will increase sleep times. Also, the SuperNova has a history of the bearing being tight to the bearing seat, so it may be a pain to remove. The Grind Machine will have the spacers tight to the bearing, so again, you’re going to have trouble getting to the bearing. The Token ranges from loose to the bearing seat to snug and nearing a bearing puller to remove it, but nothing special.
I’m suggesting the following:
$9, get yourself some 100% pure acetone from a hardware store. If you can get something smaller, then get less and spend less. Then also get yourself a small glass container with a chemically resistent lid to place the acetone and bearings in for cleaning. Mineral spirits and lighter fluid are also widely used. I prefer acetone.
Clean your bearings out properly. If you must use lube, dip a needle or long pin into the lube, and touch that tiny gathered bead to a ball in the ball bearing and then spin. Repeat no more than once. Seriously, that is all you need, and the repeat is often not necessary.
All your symptoms point to bearings needing cleaning. Trust me when I say that a cleaned bearing AND improving your throwing skills are all that you need right now. I’ve been down that road not too long ago and getting better bearings did NOTHING to improve my game. Only hard work.
But if you want to buy new bearings, I won’t stop you. I’m just telling you that buying new bearings isn’t going to help address your problems unless you have bad bearings. At the same time, let me say this:
I think the SuperNova has a CenterTrac in it. I don’t care for the SuperNova, but I would stick with the CenterTrac, including the new 10-ball CTX bearing, which should be smoother and/or quieter.
I think the PGM comes with a flat. It’s your choice what to put in there.
The bearing in the Token is a flat and is OK. If you wanted a flat bearing, get a YYJ Speed bearing to save money or a One Drop 10-Ball. I found this yoyo works best for me with a flat bearing. I did not care for how it played with any shaped or grooved bearings.
Another choice might be Terrapin X bearings. Lot of choices, including my favorite being the wing-cut 10-Ball bearings, which have a slight cut, giving you “centering” performance while maintaining flat bearing freedom of string movement. His prices tend to be extremely reasonable and I’ve had nothing but amazing results with his bearings. They also come Dry Play treated, which is also currently my choice for bearing lubrication/treatment. This is also why I use acetone because you must use acetone as part of the treating process.
Again, I am recommending bearing cleaning. I think that’s your best option for now.