I normally resist talking about our own products on this list, but since there is some incomplete information I will offer some corrections.  I won't speak to competitor's products.


 - Get USRP N (not USRP 2), if you want to have access to variety of
daughter boards, available for USRPs. Though it's quite expensive,
especially if you add a GPSDO to it.

These are the highest dynamic range and will have the best RF performance.
 
 - Get USRP B200, if you want a small single-channel device. Though
you _may_ have issue if you start playing with handover, as it doesn't
have GPS or a stable enough reference clock.


A GPSDO is available for B200, or you can use the 10 MHz input from an external source.  The B200 is by far the lowest cost option, and it has a high dynamic range in comparison to Lime-based solutions.  If you want diversity receive and dual transmit, you can get the B210 which is also a low cost option.

 Matt