Choosing a Phone

I need help choosing a phone with the following features:

A minimum of 8 lines.
POE capability
Asterisk voicemail friendly, will alert of messages
Speakerphone
Phonebook features
Nice Screen (color not required)
Headset capable, preferably bluetooth
Mute button
Attendant Console add on capability

Any suggestions will be greatly appreciated.

Thanks,
Jordan

Hi

Aastra 6757i or 6755i