I've owned them all- there are many that sound good, but Sennheiser is the keeper for comfort. HD600s can be had all day long $175-$200. I agree, an amp is critical to get the most out of them. Another $100-$200 will get you a nice Creek, Musical Fidelity, Headroom or JMT amp. Upgraded power supplies for amps go a long way. There are a few integrateds that have decent headphone sections- try first. Upgraded cable from Cardas is nice but stock doesn't suck. Happy listening.
