I wish it was as simple as saying " gentle race "
I believe all bees are gentle at times, and mean as H---- at other times, particularly weather, and my dumb careless actions.
As far as the gene pool, the Queen will fly up to about 5 miles to breed, the Drone will fly 3-5 miles to breed so you are taking in a radius of up to 8-10 miles, that area can contain numerous genes, fereal and domesticated. To raise your own Queens is easy, selecting whom she mates with is another story.
Here's a little info. on Droneshttp://www.montybees.org.uk/
Wanting the best to start with is a great idea, however, I would start with a locally raised Nuc. for your first year,experience will help you improve for the future expansion.
Talk to your local beekeeper, join a bee club, the library has or can get books on beekeeping
Raising bees does require hands on work, so many newBees don't last into the 3'rd year, sorry to say.