Jack_Spade is right on the money.
Rotodrone with a pair of Ares Alphas is pretty much all the firepower you could want, but I think you're better off going with two Rotodrones with an Ares Alpha apiece. Drones are fragile. Conversely, you could get a FB-Bumblebee (from Nothing Personal) which comes with a Stoner-Ares M202 instead, which is the toughest drone known to man and god at this time. If you load it up with APDS rounds, it's doing 10P with AP -7. The thing's a beast - but it costs a cool 24,000nuyen. It's illegal as hell though - but so are aftermarket weapon mounts and Ares Alphas. However, since it comes with a Heavy Weapon Mount for the Stoner-Ares M202, you could swap in a sniper rifle.
RCC is basically - do I have a lot of one type of drone or do I need noise reduction? Then it's useful. Otherwise, like the man said, just go for a high-level commlink and call it good. If you need the noise reduction, get a reciever dongle and attach a vectored signal doodad for 4 noise reduction. I do recommend stacking on drone types - Fly-Spys and Rotodrones are my goto.