107.9's signal, on the whole, is far better than 103.1's. The most important part of the market is Palm Beach County, not the Treasure Coast. First, 107.9's signal covers the entire county, without problems. The same cannot be said for 103.1. In addition, 107.9 has good coverage in a good chunk of the Treasure Coast. 107.9 has been targeting Wave for a while; in one of WIRK's "local" liners, the voiceover says, "The Treasure Coast's Country Station, 107.9 WIRK."
I would still bet on 103.1 and 106.3, the stations with the two weakest county-wide signals, being sold off.
Yes, WIRK isn't going anywhere, it's been very successful at 107.9, both in ratings and revenue. Anyone know why 107.9 was never upgraded to one of the taller towers in Palm Beach County back when they could have done so? Was it ever technically possible?