I'm writing this review having just bought the skullcandy Titan headphones, and I feel bad I didn't review these before.
I bought them about 18 months ago when they were 13.99 and they were amazing. Sound quality is amazing, bass so good you feel it in your cheek bones without them ever distorting. Perfect, clear and durable...until mine fell out of my pocket on the bus. Disaster.
I bought the skullcandy ones as replacements to try them out as I'd heard good things and they were a bit cheaper than the Sennheiser CX300 II, despite having the same RRP.
I honestly wish that I'd replaced like with like and gone for the Sennheiser's again for an extra tenner. Literally twenty times better than the skullcandy ones in every way.
If you are umming and arrring, go for these headphones above what ever ones you are looking at. Head and shoulders above others in it's class.