Suits and suit coat pricing is generally indicative of quality, feel, and comfort. Now with that out there, finding a good site or (better) local business with vintage products can save you big $ and still set you up in a fine quality product.
If I ever get my freaking weight stabilized again, I need a really nice casual sports jacket. I prefer wool products year round due to their ability to breathe and stabilize temperature better than any other material I am aware of. Wool also rarely wrinkles, does not promote odors, feels great in that it drapes well, lasts generations, and it is tough. I now wear wool socks all the time. I picked up a wool vest from Filson a few years back. Best wardrobe purchase I have made in years. Winter, spring and fall I am rarely without it.
Check wool products out! It isn't the itchy stuff you remember.
Wool products are like any other in that there are good and not so good grades and brands. Read reviews.