Back to the Heir Audio 5's.
Here are my impressions after listening to them off and on for a week.
Clarity is it's strength. These really show off music with great clarity but without being clinical in any way and without loosing out on any of the fun factor.
Laid back - these aren't going to give you any harshness at the top end, nor major slam on the bottom end. They give you enough bass to keep one satisfied, mind you, but they are not bass monsters. And they are not sibilant.
Like any earphone, they work best with a real tight seal. Once you get that, in my case using Ortofon medium tips, then you are set to go.
They work really well with a variety of music styles, unlike some earphones that have strengths with particular genres.
Major weakness seems to be sound stage. To my ears they sound somewhat congested, like everyone is really close on stage, and you are standing feet away.
Over all the Heir 5's are quite an excellent earphone.