Sounds great. The konkave and silicone is up to you, some people like those and some people don’t. If the money isn’t a problem then you might as well. I hopw you love your new yoyo like many others have.
I can’t say what would be best for you, but I got mine Monday, and played it stock for a while. It’s a bit too responsive, so I took a very small O-Ring to space the gap. I can’t tell you the exact size since I just grabbed the one that looked right.
Sorry it’s a little blurry, my camera wouldn’t focus right.
Anyway, I plan to switch to Silicon, but haven’t decided whether to go flowable, or buy the rings. I’ve been debating a KK as well, but haven’t made up my mind. You could get it and decide you like to play it stock, but I’m used to something less responsive.
Silicone isn’t better than any other response system, just different. It tend to be more grippy with less friction while spinning because it is flush.
Konkave bearings don’t make a yoyo sleep longer. You improving your throw is the only thing that can really do that. However, they do help keep the string centered.
It does help with sleep times in that it keeps the string from the sides, which will reduce sleep time. But that can be done with improving your throw as well.