How to Spot Quality within Web Design: Examples & Tips
Have seen a lot of terms of “high quality design” but there are no standard valuations of design quality, yes in the end it is depend on personal taste but wefunction has published a great tutorial in detail about tips to create a high quality web design along with real examples.
A lot of checklist includes: spacing, pixel perfect details, Typography, Organization of elements, and so on. just check it out
The other one is Accessites dot org, they have professional reviewers for high quality web designs (free and open submissions avalaible).
Based on web standard, accessibility, usability, and use of proper graphical designs.