My new HT sytem is on the way and I have three possible locations for the sub. All the locations or within 10 feet of the listening area but require runs of cable between 15' to 50' in order to hide the cable. Of course the wife likes the 50' run so the sub hides behind a chair. Ultimately I'll place the sub in the location that gets the best SPL meter range. I'm considering the RF link so I can try out the different locations without having to buy a 50' cable. Is the RF link as good as a descent sub cable?