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...