My absolute alltime fave RC was Harold Hallikaainen's DRC-190. Flexible, worked great, expandable, inherently multisite, etc. Unfortunately, I don't think anyone but me ever bought one so he quit building them. Shame.
The WRVC-8 is nice but won't take a negative sample, which means you're gong to have to build an outboard converter to control a Collins/Continental '3 bay' FM radio.
The Arc-16 has its moments but they're reliable and accurate. I've also got a bunch of their PPM gear, and it works well, within the constraints Arbitron has. It took a bit to figure out what circumstance caused what actions with it. It will, however, keep you encoding if there is a working encoder in the same room with it.
I bitched mightily to Pete several years ago, and apparently so did a lot of others, because they reworked the tech support division. Since then, I've not had any trouble getting answers. Dan (Roche, I think) is Da Man for most of their products.