I dont know what size call center you have but from the other systems listed I would suggest you look at Nortel's BCM (business communications manager). It programs via web browser, supports almost everything in one box, and has a great ACD package built in.You can go here for more info
http://www.nortelnetworks.com/produc.../cc/index.html . I used to work on Vodovi alot and consider them to be pretty crappy but that was over 5 years ago so I'm not up on the newer stuff.