That's what it all boils down to for me. There is nothing like big swimbait fishing, not even topwater or a red hot jerkbait bite to me.
Everybody who goes does the rabbit hole says the same thing, the addiction factor is off the charts. I'll know I can catch a dozen fish on other stuff, yet stubbornly keep fishing a big bait.
To answer OP's question:
I first started with $20-35 baits......S-Wavers, Sneaky Petes, Traces, BD Shads, Arashi 18/19, even Gantarels, none of them gave me the "eureka" moment, although I caught a few fish over 5lbs on them, along with a handful of other fish.
Then I spent $42 on the Shimano 190SF, and boom everything changed in terms of addiction and understanding what it was all about in terms of followers, and ridiculous boat side blowups, etc. Biggest fish thus far is a 7lb, but have prob. caught close to 50 fish on the bait in only a few months.
Then I spent $60 on a SPRO KGB Chad Shad a week ago, already caught half dozen fish, but had so, so many followers including one giant. Time will tell, but it's just that much better of a bait than the other big baits I own beside the Shimano. Lot of this comes down to the sink rate. All the other slow sinks from the baits I listed above sink way too fast.
This led me to be the guy you likely started the thread about......yesterday morning I managed to score a KGB TSG for $175. I've been trying for a month or two to score a real deal high end Shad glide from either Phoney Frog, KGB, or the Bucca Bull Glide or Trick Shad. These baits sell out without a minute.
Resin baits have a slower sink rate, and according to the owner of KGB a resin Chad Shad burns a little better vs SPRO Chad Shad, but the ABS SPRO version has a wider glide. Other than that he says they are within 95% of each other.
When I witnessed a potential DD sized submarine barely nip the SPRO Chad Shad the other day, and then slowly turn away and swim back down to 20-30ft........I was still left with an experience I can't get using any other bait.
In summary, you get what you pay for with these baits. Ben Milliken owns a piece of 6th Sense, is shilling Draws all the time, yet when it was time for him to actually win a professional derby, he was catching them on a $500+ Hinkle Shad, and even caught a weighed fish on a Tiny Klash ($100+). He was throwing a Moby as well, which is another really expensive HUGE 15" bait. To me, Milliken is the best big bait fisherman currently.
I had to pay the stupid tax of about $200 to learn this. You can still catch fish on the cheap ones, but if you're serious about big baits, this is the only conclusion.
This is the real problem as I've talked with Phishli privately about.......some of us just want a handful of these high-end baits to actually fish with, but a big segment of the swimbait community are beanie baby collectors, or worse straight up flippers and make it really hard for folks to get them.
I missed a drop for KGB TSGs last week, this week just out of curiosity I checked EBay, half a dozen out of 100 baits were on there with a markup of anywhere from 50-100 bucks.