Si4361 for mindbogling prices at aliexpress. It seems the chips works pretty fine. Currently designing a custom application with it (dual CAN datalogger / telemetry).
However the Silabs is one hell of a nasty mess regarding documentation of these chips. They seem to think that everyone just needs a single specific configuration for a radio, generated by a PC tool, and then the binary puked into the chip byte by byte. What a bullshit! I have found zero to none documentation as how to make your own initialization of the radio. When we wanted just a simple RF CW tone for testing purposes, we have to reverse engineer the binary crap produced by "the tool" (I cant remember the name), as the tool sets hundred of registers for a stupid simple task, where just only like only a few of them really need to be set.
They also have some kind of library available for that Si4461, but I hate it too for some reasons, so currently we are writing a specific our own, that will fit our requirements of being versatile for high end applications, no expenses spared.
There is also a metric shitton of other "makers libraries" but stay away of those. These are mostly single purposed, inefficient low throughput ones, usually for some kind a toy kit like arduino.
To sum up my experience with Silabs digital radio transceivers so far: They are very capable nice chips wit a LOT of features built in. However the documentation sucks big time, if ones requirements aren't fulfilled by a pregenerated binary crap.
//EDIT: BTW, your link to digikey links an analog audio tuner, so why the "digital" in the title? I do not quite get your intentions here.