I shortlisted Internorm and Norrsken in the end when researching our door and window package.   I looked closely at the Rationel Aura Plus as they were good value. I particularly wanted tilt and turn on the opening sashes, and while they offered this, at the time they provided it by a sash within a sash, so the opening windows looked quite different to the fixed windows. Looking at their website now, they appear to have revised this. I also wanted natural wood on the inside and wasn't