If you want the best quality then you need to be looking at things other than nutrients.
You are not going to find the best quality in a specific brand of nutrients.
There are much more important factors than nutrients. If that's your path then you'll never find the best quality.
A good grower can use any nutrients.
Becoming a good grower will give you the best quality. No brand of nutrients will replace knowledge.
Many think success can be found in a bottle. It can't. The forums are full of people spending exorbitant amounts on nutrients only to end in failure.
Spot on, IMHO.
Your are right about the most expensive nute lines don't mean you will have the best results. The amount of times on here you see noobs that have dropped a load of $$$ on Fox Farms, Advanced Nutrients, Bio Bizz and similar, only to produce some of the worst weed I have ever seen. I used to buy into all of the hype too.
I have used Bio Bizz and Plant Magic Old Timers before and have had good results. But it wasn't till I came on here and started hours of reading and interaction with other growers did my weed really begin to improve.
I use a local soil mix called Westcountry Gold, it is made just up the road and it is aimed at people growing fruit and veg in containers, just add Perlite and you are good to go. It is super cheap, because it is made locally and marketed at people that aren't going to drop a large sum of money for one bag of soil. My feed is called Tomorite and is a liquid seaweed feed marketed for Tomato growers. It is made by Levingtons, who are a big producer of garden supplies in the UK. If you read the label you discover they market the same product under various brand names and change the dilution ratios to suit the type of plant they are marketing it at. I use the tomato version because it is by far the cheapest, it wasn't rocket science to work out how to use it with Cannabis.
My advice to noobs is don't be taken in by the marketing hype that the Cannabis brands spit out and don't bother with anything that has a cartoon character on the label and doesn't publish their NPK data freely. The bottom line is that if the don't publish the data it is because if you knew what was in there you'd realise it is just bog standard plant food in a fancy bottle.