[Spicez]

I'm after some closed full over-ear headphones for electronic music, I almost pulled the trigger on the Sennheiser HD202s until I saw that they are more on-ear than over-ear, bit of research later I've narrowed it down to:
 

1. HD201/HD202[?]
2. JVC HA RX700
3. Superlux HD-668 B (poor isolation?)

 
I've seen mixed reports on the isolation of the RX700s, some saying these is basically none, others saying it's acceptable or good (on Amazon reviews also).
I want to spend <£30 ($50), and I'm currently using old Sony Ericsson earphones, so anything with better sound/isolation than that would be great.

 

[stevenswall]

Great isolation and bass handling: Sennheiser HD280 PRO. The 201 is terrible for sound and isolation, as both the treble and bass roll off.

 

[Dsnuts]

Try out a JVC HA-M750.