I have the house of Marley ones, and the Sony ones. No contest. Sony wins hands down. The actual sound is about the same, but the buzzing noise in the house of Mally ones stinks of cheap cheap cheap... nothing like that in the Sony ones.
Good work OP, I only miss Anker & Tribit Xfree Tune
I got a grade A set from CeX for £22 (embarrassed) but I would have paid £50 for them and probably more. They're really comfortable, well-made (well, I think so despite some durability complaints) and balanced (not bass heavy).
I think you could get some really decent ones for around £100 if you wanted to spend more than £50. The AKG N60NC Wireless are meant to be amazing, you can get them now and again for about £120.
Amazing, I would definitely get some if they come up again. They are clearly the best in this bunch.