I also agree with /u/noslowerdna and /u/dan994.

A couple years ago my favorite bag was the 2.75" 140g SportCo Large bag. I had a set of the Gballz 2.75" 130g e8s that were great but I didn't like as much. But in the smaller size my Gballz 2.5" heavied up to 115g are fantastic.

But as nice as Gballz/Sportco bags are, I highly recommend you try DIY Russians balls. These 65mm shells from Amazon work really well. Make several color-coded sets at different weights, say 60g, 75g, 90g, 110g, and juggle with all of them. Surprisingly, despite previously being biased towards heavier bags, I'm finding that I prefer the lower weights, 60-75g.

If you think that 65mm may be too small, I see that Amazon has a set of 70mm shells.