[Discuss-gnuradio] Regarding Transceiver design on GNUradio

Dear all, 

I  am working on re-configurable  Software defined radio based  multiband transceiver (initially for ISM band 2.4 GHz).for that i am using GNU Radio for software design .For hardware design i come to know that Development Boards (i)USRP Motherboard (ii)RFX2400 or SBX40 or CBX40 are  required .

my quires are 

(1) Is GNU radio software is sufficient for full transceiver design ?

 (2) What other components are required in the hardware circuits?

(3) What is the cost of USRP motherboard, RFX2400,SBX40 and CBX40 ?

Thanks in advance 

amit