Welcome back Kim- glad to see you back in the game
First for shoes, I also recommend the 3G Tour Ultras. They're comfortable and versatile. Plus their quality seems to be a little better than Dexter SST8's.
As for balls, it may depend on the shape of reaction you are looking at. My opinion is that Storm and Roto Grip do make 2 of the most complete lines available today. Track also has a very nice product line. Basic difference between both is that Storm tends to be more angular and Roto has more of a hard arc motion. Track has a great mix of both solid and pearl covers but no hybrid covers. With that being said, they do have a very good line and I currently throw a few balls from them in addition to my Storm/Roto Grip stuff.
After reviewing video to see how you throw, here is what I would suggest:
Heavy oil: Roto Grip Defiant. Great solid reactive piece that's clean up front yet has a nice heavy roll in the back. It carries well, is predictable, and I think would fit your game well on slick conditions.
Another option is the new Track 912T which also does a great job getting into a heavy roll and carries well. It has a proven core that stores energy and a really strong cover to help you get maximum traction.
Medium-Heavy: The Storm iQ/iQ Tour Edition or Roto Grip Critical Theory all give you great options if you want more skid/flip. Just depends on if you want a symmetrical or asymmetrical core. If you want more hard arc, the Roto Grip Outlaw would work well. If you want a mix between both, the Roto Grip Infinite Theory is a nice hybrid that can handle medium-heavy conditions.
If you go with Track, the 919C or 716T would be the go-to pieces. The 716T has great traction and very good carry. The 919C is more of a control piece that offers good predictability. The 706A or 718A are the pearls that give you more skid/snap when you need it on the back.
Medium: The Storm Cross Road/Hy-Road are good options. Both are hybrids (Cross Road has a slightly modified core but both use the same hybrid covers). Also, I could see you using a Roto Grip Bandit (great pearl ball for this). You may also want to consider the Roto Grip Berserk. This is the hybrid ball that uses the same core as the Bandit.
From Track, the 503T allows you to get through volume easily, whereas the 503C is a very nice control piece. If you need more skid/snap, the 508A will easily take care of that.
Medium-Light: From Storm, the Tropical Heat line is great. There are solids, hybrids, and pearls in that line. However, the hybrids are very strong and actually more for medium conditions. You may also want to look at the Fringe (solid) and the Frantic (hybrid). From Roto Grip, the Shooting Star (solid), Rising Star (hybrid), or Shatter (pearl) can fill that gap nicely.
From Track, the 300T (solid), 300C (solid- control piece), or the 300A (pearl) are proven and tough to beat.
Light Oil:
From Storm, the Tropical Breeze line would be the line to look at. Roto Grip has the new Scream (pearl) and Shout (solid) use a variation of the Nucleus Core in the Rising/Shooting Star and Shatter. It's an awesome core and stores energy very well.
With Track, they don't have a true light oil line. However, I would lean more towards the 300C or 300A in this case. The 300T would react way too early in the midlane and is not the best choice here. If you were to go with the 300C or 300A, you may just have to change the surface or use a slightly weaker layout.
Spare balls: Either the Storm Brain Storm, Storm Ice, or Track 100P will fit the bill.
Hope this gives you some good ideas and if you have other questions about the Storm/Roto/Track lines, feel free to let me know.