These are MY best recommendations based on personal use and experience for mid priced gear.
Reels....Okuma Coldwater line counters, size 20. Yes Tecota’s are nice and but nearly double the price. Great drag and adjustability, I have 10 that I use for trolling.
Rods....Ugly Stiks, tough as nails, great price point (Anglers Point ordered all mine and beat everyone else price wise) and like many others have said, trolling rods are not important as reels with good action. One thing that limits them in some boats is they don’t offer a model with a collapsible butt end like some manufacturers do.
Boards.... none other than Offshore. You can find cheaper boards like Opti’s, Cabelas or other Crazy Benzie’s brands, but for a couple dollars more you can own the best, most customizable and reliable board on the market. Frank’s in Linwood offers a special on two boards equipped with tattle flags already for the best price out there. Michigan made too, great pro-staff support at shows and seminars.
Nets....Ranger, while there are tons of nets on the market, some at outrageous prices, nothing compares to Ranger in price and durability. Also, based in Michigan.
Line...Berkeley XT 10lb or Berkeley Big Game in 10 lb. Don’t believe the hype in a few other brands that some guys hype as the best, made that mistake with Sunline a few years ago, biggest waste of money I’ve spent on fishing line.
Baits....I think we all know Bandits, DDHJ’s, & Flicker Minnows are at the top of every list.
Trolling app, Precision Trolling, the one and only original that started the whole revolution in knowing exactly where your baits/ lures were positioned. You can buy the lifetime membership and pay a onetime fee, or just pick out the lures/gear you fish.
Sonar, personal preference and experience was Lowrance for 20 years but the new boat I purchased in ‘19 came with a Helix 9 and I really like it. This is one area that really can go from a few hundred to few thousand rather quick. I also have a Helix 7 on the bow that would make a great unit for anybody and the price point was not too bad at $449 on clearance.
As I said, personal experience and these are what I use with great results, others may or may not like them but it’s all in what you want to spend and how you store and maintain that gear that will help it last for years.