Now, the AKG and Sennheiser are kind of a toss up for best set that I own. AKG is BT, and Senn is wired.
The bottom 2 are also kind of a toss up, and 1 set is wired and 1 is wireless.
JBL Synchros E40BT, $60
OK for what they are--plastic headphones. SQ is decent.
Cons: Build quality not that great, proprietary charging cable.
Definitely don't pay over $60 for these! I do like them as my beater or travel cans though.
AT ATH-M50, $120
Decent phones, personally I think these are a bit over rated. They are pretty comfortable though.
I used to think they were "bass heavy", but after comparing to the AKG and Senn, I think there may actually be a hump in the FR in the mid-bass. I'm not an expert at picking out the frequencies. But to me, "there is something near the low end that just doesn't quite sound right or natural". Now, on many songs, I don't even notice it. But on some it is annoying to the point that I want to go back to the Senns or AKG. I'm actually considering selling these. I've had them for a while and have maybe 10 or 15 hours on them.