I've listened to bunches of podcasts, read tons of articles and followed Cannabis Cup events. There are tons of great strains out there. I'm biased but I think the US is the Mecca for genetics now. California and Colorado to be specific. I see a lot of great stuff being done by super passionate breeders.
In my area I've noticed a lot of Cali Connection stuff. I've tried their Larry OG, Blackwater, and Tahoe OG. All have been very good. While this could have just been from the skill of the grower, I'm willing to take the gamble. A couple of other respected breeders I like are Rare Dankness (CO), Darkhorse (CA), Humboldt Seeds (CA), OG Raskal (CA), Grand Daddy Purp (CA). Anyone of them have some great strains.
There's a conglomerate consisting of DNA, GYO, Crockett Farms, and Reserva Privada. They make some fantastic genetics. I think they're based in Amsterdam but heavily in Spain as well. Serious Seeds gets honorable mention.
There's a new strain called Facemelt OG by Darkhorse. It's a collaboration strain with Rare Dankness and Archive. It's supposed to be super potent and a cannabis cup contender.