Yes, Sennheiser makes some sweet sounding headphones! I use a pair for monitoring in the studio when mikes are live and I can't turn on the monitors. I have to endorse AT (Audio Technica) also, I have a pair of them I like just as much.
Many years ago I bought a pair of Technics home speakers (SB-L95's?). They were 3-way models with a whopping 15" woofer, and an acoustic lens on the tweeters. To my ears, they sounded great. I was amazed at the high-frequency dispersion of the with the acoustic lens (a shaped plastic baffle / grille in front of the driver). Years later, a buddy looked up the model and told me that they were not rated very high in sound quality. Having not seen the data, I stated "I'll bet that the problem is that they are weak in the 3-to-5 KHz region." I've learned before that my ears were overly sensitive to that audio range, if too loud, it just sounds harsh to me. We looked up the data which included a frequency response chart, and sure enough there was a significant dip in the 3-5 KHz region, but the low and high end was very wide. They do sure pump out the low end though. Who needs a subwoofer when you have 2X15" drivers already in the speakers?
The moral of the story is - and many speaker buying tips will state this - always listen-test speakers before you buy, since everybody has different tastes in sound. I ended up with speakers that very well suit my ears and I still use them to this day.
When I was just starting out in recording and mixing music, I used those very speakers with an Akai (liquid cooled!) amplifier. Sounded awesome. Many years later I found the same model speakers at a discount sale and bought them immediately. So now I have two sets of them. Skip ahead another 10 years and I finally was able to afford some good studio monitors. They were Event brand, self-powered, bi-amped bookshelf/studio monitors, and they cost about 10X the cost of those cheapie Technics speakers. I hooked them up and of course A/B 'd them with the other speakers, and frankly once I adjusted the volume levels, I couldn't hear the difference between the two! To be fair, the Technics were run through a 15-band eq fine-tuned over the ears to my personal taste, while the Event speakers were sent a straight-flat signal.