Rob Sherwood has now tested and ranked the new FlexRadio Systems 6700 transceiver on his benchmark receiver test data page. 
The ‘6700 tops the list when sorted by third-order dynamic range, narrow spaced. Click here to view the results.
One of the major complaints I hear regarding the benchmark Microtelecom Perseus SDR is that its GUI (graphic user interface) is not resizable or scalable to fit a large monitor at full-screen.
If you’re a Perseus owner and if this is a problem for you, then you need to watch for the release of Studio 1 Software Defined Radio by SDR Applications. Which will boast:
WoodBoxRadio told me that SDR Applications is still finishing off development, but plan to have a bug-free version of their software available at the end of March 2012. They told me that Studio 1 will work with the Microtelecom Perseus, FDM-S1 and the Softrock family of software defined radios (SDRs).
We will stay in touch with WoodBoxRadio and post any updates here on the SWLing Post.