First consider a good external antenna http://www.grove-ent.com/ANT8.html
Next consider a digital receiver from RF Space http://www.rfspace.com/Home.html
I’m not understanding that link, rfspace, completely.
For instance, is the SDR-IQ a radio? or is it only an interface between a radio and your pc? if it is only the interface, what kind of radios does it work with?