Stumptown are great roasters. I love to experiment with local roasters. I travel quite a bit and I try to pick up a pound from a local roaster wherever I go. I used be pretty smug in thinking that the top tier roasters in San Francisco would beat a small town roaster every time. My opinion has changed, I've been super impressed by a lot of smaller roaster.
It seems like we are both aware that lots of beans not labeled as espresso are great for it. I tend to go for light to medium roasts for both pour overs and espresso. I also prefer malty/chocolatey profile beans over the citrusy ones. That is not a hard rule but light roasted citrusy beans can be overwhelming in espresso