Voip vs BT phone line

[fellatthefirst]

Our business currently uses a voip phone set up. It's good in a sense that we can easily set the hours we want the phone line open, play a closed message, have hold music, your in a que etc etc BUT the phone line quality is just crap. Some days i really want to just smash the thing up!

We are in a rural location and our internet is about 5mb speed. Not the fastest but fast enough.

I'm seriously considering getting rid of the voip and changing back to a traditional bt line just for solid phone line quality.

Can anyone advise me if you can do all the same features on a bt line as you can with voip?

The main things i want are as follows:

Set open and closing days and times
Play a message when we are closed
Divert calls if we want to remote work away from the office
Allow "you're in a que" function
Play a message when you first call up before your call is answered for example "Thanks for calling my company, an operator will answer you're call shortly"

Is this all possible without costing an arm and a leg because the voip set up is very cheap?

Any help or advice would be greatly received.