It was so long ago when I used to buy queens. Lots of Texas Buckfast in the 90s because Acarine losses were new to us and BF was the only strain with proven resistance. Then had some major re-queening to do because of the chalkbrood infection that developed in my bees at the end of that decade. Used Carniolans that had been selected for hygienic behavior, using liquid Nitrogen. Wow, did those bees ever clean up chalk...and fast!.
After that, I've been raising most queens from my stock, with the addition of various breeding stocks from others. Started using VSH breeders from Glenn in '04 to get that trait into my bees, and have traded other breeders, queen for queen.
Most of what I get from others throws good queens...but for the temper. The II queen breeders must never put the daughters in production colonies to see the results. Just cross two favored lines using II, and call the resulting daughters "breeder queens". Their temper is atrocious. Then it takes a few years to calm them down.
So that's pretty much what I do. I wish I could bring in some stock from your area, but I guess that will never happen.