Hardware radios are often more sensitive but I am not aware of any that is capable to show the TII-code.
OK so far, but if you want to show received transmitters on a map you need a database. I was trying together with Herman Wijnants to compile one. We asked the the transmitter operators Norkring and Broadcast Partners for information, but none ever replied. Luckily the details from the RTBf sites were freely available. So there was no other solution but driving next to every site and measure the TII codes on the spot. This job was completed after almost a year and results in this map. Our findings were also uploaded to FMList which on his turn provides the database for the QIRX application.
Zoom in and click on the antenna icons to get more information about that location.