Is there any addon for replacing robotic and sleepy ATC voices? Default ATC is boring and poor. Only has a few sentences to manage air traffic.Some dirty noise radio effects would be good. And of course more/detailed dialogs needed.I saw radio contact and vox atc addons on youtube. They worth to buy?(please don't advise online atc on vatsim or ivao, because i want that for offline flights)

Not sure on VOX Cenk, but EditVoicePack is a good starting point. http://www.editvoicepack.com/ It will change phraseology and little minor adjustments that you will notice, as well as being able to speed up and slow down the speech engine.However this doesn't actually change the voices. Another thing to think about is radar contact, although it is probably best to wait for the next version.

I rarely use ATC, but for what you are looking for this might interest you:http://www.oncourse-software.co.uk/pfe_details1.htmLots of voice sets available

Yes, PFE is the way to go. Both PFE and RC are confusing to start with but once mastered PFE gives the better all round control in my view. The voices are real and regional so not only do you hear a French controller with the associated accent but also the Air France P2. It also allows good control of SID's nd STAR's.vololiberista