You want bang for the buck - arguably one of the best values around? The Philips SHL3300 is what you want.
You can get them from Newegg/Amazon for $17-$19 shipped, and I liked them so much I picked up a 2nd pair for $7 shipped.
They have a nice full range, good soundstage, nice tight bass (v-shaped but not bloated), and sound better than many headphones costing $150-$200. They have a plastic fantastic construction given the price point obviously. However, the plastic is of good quality, quite thick, not creaky at all like many all-plastic headphones, and the DJ-style hinges are solid (despite being plastic).
For best sound, you'll need to do a few simple mods, in addition to most definitely replacing the stock pads (not due to comfort but due to sound). A set of HM5 pleather or sheepskin leather pads works best, as well as a quality ~$10 ebay/aliexpress 90mm/95mm/100mm round pleather pads (30mm thickness recommended on round pads). I wouldn't recommend velour pads.
They are pretty comfortable stock, although I did a headband mod that increased the headband comfort level 200%. Headband has good range of adjustment, and can be easily tweaked for less clamping force (although I found the clamping force just fine).
The mod thread is here (
http://www.head-fi.org/t/697813/review-philips-shl3300-dj-headphones-most-underrated-headphone), with the mods detailed on pages 12-14.
A good 50hrs of burn-in gives the best sound. They sound great amped, and even better amped. The cord is attached (even has a short coiled section), but it's trivial to do a removable cord mod.
Don't let the low price fool you. Give them a try; I assure that you won't be disappointed.