Happy with my Tekotas and I own over 2 dozen between 800's, 600's and 500's. Taken an awful lot of fish on them and no regrets. Good luck with your decision.
If you decide to go with scottys I would recommend the older style with the mechanical counters. Pretty much bullet proof. Also the extendable boom and the swivel base gives you all the flexibility you will ever need
https://johnssportinggoods.com/product/downriggers/scotty-downriggers/electric-downrigger/scotty-downrigger-1116/
https://johnssportinggoods.com/product/downriggers/scotty-downriggers/electric-downrigger/scotty-downrigger-1106/
Good luck with your decision
Usually doesn't matter to the fish. It's more of a speed thing dependent on what you have in the water and how you adjust your boat speed to the current. Plenty of days working the same area I have been taking more shots going in one direction while another boat in the area is getting bit more moving in the opposite direction.
I put a couple hundred ft of 40 lb mono on the 600's and 1000 ft of 30 lb 7 strand fills the reel nice.Edit. Good luck.
Opps sorry. you were asking about the rigger reels.
Good luck whatever you decide. I currently have four Scotty electrics on my boat and been running two of them since 1994. They are virtually bullet proof and personally do not have any reason to buy anything else. The only downside is they are physically larger than the other brands with the horizontal spool.. For ease of use and reliability I have nothing but good things to say about them. Reasonably priced as well.
2 lbs heavier on the probe rigger than the rest of your riggers is whats recommended to compensate for the additional blowback caused by the probe. That's assuming all the weights are of the same design. I have found Torpedo weights are good for reduced blowback and the old Atomic 13 lbers are what I still run for deep fishing. Sharks are nice but expensive.