I have the RS185- picked them up last month. They replaced my wireless 180's. They do sound better. Bigger, Richer, etc. My only issue is in regards to movie viewing. Sennheiser claims these phones can deliver an uncompressed signal...but when I tried to send it Dolby True HD or DTS HD- I heard silence. You can not bitstream these tracks to the RS185. You have to send it PCM. Which I feel is kind of a rip. Sending uncompressed was kind of a big selling point for my upgrade. Sure the PCM still sounds great- but if I have an optical connect- I want it to be able to accept a HD digital signal. I believe Sennheiser released a pair of wireless phones a few years back that handled HD audio- but they suffered from major drop out issues. That said Pioneer has had a wireless pair of headphones- that date back several years- that can handle Dolby digital and DTS over optical. They also suffered from drop out BUT only if you moved out of range. If you stayed in sight of the base- or in the same room- you were fine. I was offered a refund- but I decided to keep them due to the analog inputs- which come in handy for LP listening. These phones really do deliver a sweet sound. I put on a record and hear stuff going on- I never heard before. Going wireless- with these high end headphones- I feel I lose very little and gain so much. The freedom to move around- when you need to- without a break in the music (or show)...once you have that you will never want to go back to a leash.