I use the DC 20-10XL.
I got them about 11 years ago, and they are still going well.
They were the best DC's you could buy at the time, and had a price tag to match, but spread over 11 years it's not bad value.
Apart from replacing a microphone sock (about $4) that had become worn out, I've had no problems whatsoever, and they still look the same as they did when I opened the box. For wear and tear, I absolutely couldn't fault them.
Having said that, they are 11 year old technology, and I'm sure the ANR technology has moved on since then. If I was buying a new set today, I'd buy the Bose or LightSpeed Zulu. But since you're looking a buying something a few years old anyway, they are a good choice.
The clamping force is a lot lighter than most DC sets, which makes them a lot more comfortable.
dp