How much did you pay for them though? I would consider those as flaws but it would depend how much you spent for them for you to decide to keep them or sell them.
I haven't seen any 574JA online lately and I am looking for a pair myself. Sadly they did not release in my location.
Anyway, my share today:
1. 999 - Never experienced anything unpleasant using them (Kennedy, Elite)
2. 574 - It's almost a toss with 999s (Mojito)
3. 1500 - First NB I ever had (Desert Storm)
Let me just add this, I hate my 1300s because the tongue keeps slipping on the side everytime I walk with it.
The ride is OK but you know that feeling where the tongue slides on the side, it's annoying :x
Bottomline: All of my NBs are pretty comfortable actually