One of the best boards that's likely "mid range" is the Asus Z87 Gryphon. It's about $155, has all the features I need, and comes with a 5-Year Warranty due to its very "TUF" build quality.
So support is as good as it gets, so I consider the "high" range to be more about features such as: wi-fi, M.2 SSD support, "SupremeFX audio", better overclocking etc.
Some of the low-end boards also have sufficient features for most people, but you need to be very careful as quality can be lacking due to using lower quality parts (i.e. capacitors).