My experinece is that Attitude-Choice, Seedsman, Herbies and so on, list a 100 plus 'breeders' and you have to dig through all the crappy ones to only get the occasional decent one like Karma... so many of these breeders get their seeds mass produced in Spain. Further, some of the others with the big full page spreads in HT like Greenhouse and Barnys Farm are frauds and prey on those who don't know any better. They also try to adopt the hype names in the USA and capitalize on it.
The quality of gear in the states is top notch ime. Over the years I have run gear from sensi, white label, GH, BF, DNA, serious, Soma and many others. What I can say is that European banks and the breeders work for some but I have no idea why anyone in the US or Canada would feel compelled to use them over the ones here.
It's the seed game. All I am saying is that not all the guys oversea are 'proven' and not all the guys in the USA are fly-by-night or get promoted by their buddies.