We defected to Acana in the fallout from the TOTW recall a few months ago, too, and we love it. Lerwick has poultry sensitivities, so our choices are pretty limited no matter what brand we're looking at, but with Acana Regionals we could either have the Ranchlands, or the Pacifica. We chose Pacifica, because it is a few bucks cheaper than the Ranchlands in our local shop. We were so impressed with the Acana Pacifica, we switched our cat, Majo, to the Pacifica for cats, too, because when we opened the bag of Pacifica dog food, she jumped up on the table and tried to crawl into the bag... and Majo is very persnickety. She would rather not eat than eat bland kibble. This is the first food she's really liked. We recently rescued a stray kitty from a local park, and she gobbles this food up too.
When we decided to break away from any and all Diamond products, we did a lot of research into what would be comparable. Wellness Core and Orijen were definitely on that list... but like you, we just could not spend that much money on Orijen. We have not tried the Wellness Core, so I can't really say how it compares.
Acana gets 4 thumbs up from the humans, and 12 paws up from the pets, in our house. I always recommend this brand to friends looking for a high-quality kibble for their pets.