with the headphones properly broken in, the high-end is utterly smooth

If you have a pair of headphones and you are satisfied, that's perfectly fine, but when you step into the realm of high end headphones, all the low and mid end ones you had before will sound like tin cans or sloppy bass cannons

The highs were harsh, not much low end, and the cheap-ish plastic feel

All of this makes the Ultrasone Pro 900 nearly too irresistible to pass up, especially if you favor the bottom end of the sound spectrum, in which the Pro 900 excels in more than any other headphone I've ever heard.

with the headphones properly broken in, the high-end is utterly smooth

I am a bit of a collector of headphones looking for just the right sound (listen to mainly blues rock) with headphones from Sennheiser, Grado, Beyerdynamic , AKG etcI am also a bit of a fan of the ultrasone line ups in the more affordable end of the rangesI currently have the HFI 2400, 780 DJ1 HFI 15, Pro 2500 DJ1 Pro and now the Pro 750 after selling my pro 900.After reading all reviews and my own experience I often wonder if people reviewing the Pro 900 are describing the Pro 750 as in my view the Pro 750 is a better sounding headphone than the 900.If anyone is considering a closed back headphone of good quality with great controlled bass the 750 is for you - the 2500 or 2900 is a great alternative if you prefer the open back sound

Good low-end

I've always heard Ultrasone had a legendary bottom end, but nothing could prepare me for what I was about to hear

Good low-end

I have significant hearing loss in one ear, so blowing a week's wages on super-high-end gear would just be a waste