The ultracurve is a great unit. It does exactly what is says it will do. I had one, but sold it to a friend when I liquidated my studio. If I ever get back to doing any recording, I will buy another.
It takes a bit of a learning curve to utilize all its features; but they all do exactly what they say they will do. I particularly liked the "feedback eliminator" which I used as a narrow-band parametric equalizer.
The RTA also works as advertized. I equalized my rooms/speakers many times with good results. I had the AES/EBU digital IO option installed, and that worked well also. You can easily install it yourself, even though Behr. recommends service center installation.