Questions about the USRP

Hi,

Guys, I want to start doing some experiments with SDR using the USRP and
I
have some doubts.

To begin with, I’d like to replicate the experiment described in this
paper:
http://www.inf.ufsc.br/~tiagorm/Thomas_Schmid_PAPER.pdf , and would like
to
know what hardware you recommend(USRP1 or 2, the set of daughterboards
and
antennas).

Next, i’m planning to build a standalone system using the USRP2 to
bridge
802.11 and bluetooth connections, and i have some doubts about the
RFX2400.
Can it transmit and receive at the same time? Is there another
daughterboard set that is better suited for this job?

Thanks.