USRP monitoring

Hello all,

I recently installed gnuradio (3.2.x) on my machine (OS X) and was
wondering about purchasing the USRP. It seems that usrp2 is currently
only supported on Linux, so I guess I shouldn’t get that one. Can
anyone recommend daughterboards that would be best for simple
communication, e.g. for building networks with USRP’s as nodes?

I also had a question about monitoring, I couldn’t find anything in
the archives. Is there a way to monitor USRP’s performance in
software? Something like performance counters? I don’t have a strong
DSP background, but I imagine there are some metrics that are common
for all SDR’s.