Cally, I always hear people say "it's not the camera, it's the photographer," but I also can't help noticing that the great photographers tended to have really good cameras. You can probably take better pictures than most people can even if you just use your cell phone, but that doesn't mean you won't have even more success when you get better equipment.
Anyway, the mirrorless may not be for you if the somewhat smaller size isn't important to you. There's still something satisfying about having the old-fashioned feel of an SLR in your hands. And most of the mirrorless camera make you compose on the screen instead of through a viewfinder you place against your eye. It took me a while to get used to that, though it happened.
Here's a mirrorless camera to look at.
One other technical point that is probably unnecessary. It's fashionable these days to point out that high megapixel numbers aren't important, because it's not the same thing as picture quality. And this is true. But if you want the freedom to be able to take a very small part of your picture and crop out the rest and still have a sharp picture, then a high megapixel number is indeed important.
I'll check out the Hass. Haven't read it.
PS-- Whatever you choose, price it on ebay. Many reputable online sellers will demolish prices charged in Seattle camera shops.