I don't need isolation; I don't think... but, two factors, for your consideration, Armaegeis. I'm not sure what different headphone types are like in terms of isolation, hence all this info ... I'm trying to put things into concrete terms.
Factor one: Though my window is pointing out towards Yonge street, one of the busiest streets of Toronto, downtown and I hear whole bunch of stuff like frequent sirens and motorcycles, large and a constant stream of vehicles, party people by night, and constant construction by day, but so far ambient noises don't really bother me, I kind of enjoy being at the center of activity.
Factor two: It might be good to hear things which are happening like smoke detectors, things like that, because I'll need to know if there's emergencies; I also need to make sure that my neighbors are well in terms of health, many things might go wrong and I have to be aware of that as I'm the one is able to help. There's only one neighbor beside me, separated by a one inch wall, and three living below me. If I can be sure that my neighbor beside is well, that he's not sick or falling over, and he's a rather big man. Either way, he won't know if I have my headphones on or not because he has severe hearing impairment.
Budget, well, the Philips' apparently are great for electronic music, and it's ~$600, not $500 ... and I really do believe investments, which take a few months to save up for, given my current budget, is worth saving for/repaying slowly on credit. So I'd be happy to pay for anything less than luxury... I would be a lot happier if they would cost around the price of the Marshall's or the V Moda's, so $130-$300; which seem much reasonable because they shall burn less of a hole in my wallet, which is good ... with all that stated, the most important factor is excellence not price for me.
The last factor is I would prefer not to buy an amp ... there's just too little desk space for the controller + laptop to also have an amp.
Edited by Tweakings - 6/19/13 at 10:28am