I don't think that they had jumbos when I ordered years ago. They sound like the way to go because the first year is not much on yield and a lot of root establishing. But I don't want to feel like I am compensating by getting the jumbos.

That's a good question about the alpha acid levels. And to complicate matters I always use pellets hops, so that needs to be taken into consideration, too. I always assume low (around 8%) and it seems to work out fine.
Seven is harsh stuff, but I use it in the garden, too. As long as you wait the described amount of time between spraying and harvest, you should be OK.