[geeks] Phone system suggestions?

[Nate]

Hey guys,

So day job is moving, and not too long ago added the phone system to  
the list of many things I manage.  It's a Panasonic hybrid system  
(analog/digital over two wire RJ-11), and maxes out at 96 lines (half  
digital, half analog), but the company could outgrow that (and  
managing it is a PITA), so it's time to look at something else.   
Would you guys recommend Asterisk?  Or something else?  I'm mostly  
concerned with something that's pretty easy to manage, flexible, and  
not crazy expensive...

- Nate