I have settled on the Linear Technology LTC2208 16 bit, 130 MSPS ADC for the HPSDR project. The LTC2208 has some unique features that put it ahead of offerings from Analog Devices.
Here is the datasheet:
of particular interest is the PGA, randomizer and dithering features.
We completed our move into our new home last weekend. We are getting settled in and soon I will start on the Mercury board - which is based on the LTC2208.