i like the ringers 6mm expanders and the cold water ones. not used them new dark ones yet. bag up mix is good, groundbaits i mainly use dynamite baits or ringers. the dark or green swimstim stuff. been using the got expanders too lately.
IMO there aren`t many bad baits on the market.
Most baits are field tested and most claim to improve catches, so if you find a bait that you are happy using you should do ok especially on overstocked commercials.
It`s like all advertising, put a famous name to it and people will buy it.
You would proberbly catch as many fish with an unbranded bait but if it gives you confidence go for it.
They are alll very good, and I agree with previous posters but with a proviso, I think that different brands suit some and not others depending on personal results. I prefer GOT and Merlin Baits to any others. OH Metal ........... although not in Durham, Billys Fishing Tackle is a GOT stockist, maybe they would do you some via a phone order? You can find their address on the GOT web site using the Stockists link. Failing that contact me and I will find you a stockist that does do them mail order.