Having high logic is good for hacking and computer-related skills, if you plan to become a hacker down the line. For riggers, it's useful for electronic warfare (to counter jamming of your PAN/WAN) and the repair/armorer skills which will come in quite handy. The RCC is going to give you some cool bonuses if you are trying to run a fleet of identical drones, but is fairly pricey if you want a decent one.
The RCC also can run some programs- they don't have access to the hacking programs, but a lot of the defensive stuff and whatnot, which a commlink can't run at all. The RCC also reduces noise, so you can operate drones at a larger distance, or overcome jamming more efficiently. However, for a starting character, a commlink will probably be a cheaper way to get a high device rating, to better defend your overall PAN/WAN.
Also, if you are trying to use a bunch of different types of drones, the RCC won't be as good, as the "program sharing" function won't work as well. Hope that helps!