While I do believe the Magix is probably one of the IPO's best competitors, and that it certainly beats out many of the other non-Avaya options out there in the market I do think we need to look at apples for apples comparison.
If the IPO has a feature which the Magix does not, and it is one you may even possibly use then you need to consider the difference. If you find that the Magix has all of the features that the IPO has for your application, then I would find another IPO vendor. I have never to this point failed to be able to find value added features which a customer was interested in which the IPO had that the Magix did not. That may be a reflection of my thorough approach to designing, and developing a specific application of the IPO platform for the customers business, or maybe it is just the IPO/VMPRO capabilities. 63 channel conference bridge is a good start, built in, and with the VMPRo quite flexible. There is also no Magix VM system which can do anyhting near what the VMPRO can do if that is a consideration. That is not a rip on the Magix, as it is easily one of the best systems, and likewise for its VM system capabilities, it is just the the VMPRO really has so many capabilities it is almost in a class by itself for the price industry wide. The VMPRO has such an open ability to improvise, and use features, or multiple features in imaginiative ways that you can simply create a way to do what you want in so many cases regardless of if a specific feature exists, or has been concieved yet. It is like most VM systems give you a limited number of pre-defined words with definitions to use, and the VMPRO gives you a keyboard with no pre-defined words, and lets you build your own dictionary.