@Fa5t3r - I would try a wide range of different tones when recording and play them back to see what goes over the best and what projects the image you want people to hear. Remember that some people may be going to hear this message over and over again depending on how often they have to call you so you want it to be very pleasant and not at all irritating.
28. Hey, there. You’ve reached [your name]. Please leave me a brief message about the reason you are calling and your contact information. I will call you right back at the earliest opportunity. Have a nice day!

1.) All our lines are busy at the moment – Please be patient. We will be with you momentarily – PAUSE – Have you already visited our website www.johndoe.com? Your concerns are important to us, please hold the line, you will be connected as soon as possible.- PAUSE – Just a moment please, the next available team member will be there for you shortly.
Using concise and simple words in your scripting helps ensure callers can comprehend what is being said. Although a complete on-hold message can be quite lengthy, it should include concise and to the point single messages. Aim to get each message across in around 35 to 40 words. Remember, what may read great in written word doesn't necessary sound great said out aloud.