I'm sorry to sound 'disrespectful' in any form of context; but I highly doubt you purchased both an IP.Board and XenForo license... due to the fact at bare minimum the costing would be around 300.00 USD (non-hosted). In my opinion you're trying to 'show off' or you're just highly idiotic, or both. Why would you purchase a license for IP.Board and XenForo, when you can only use one-of-the-two? Extremely pointless in my opinion.
If I had to recommend any forum software of choice, it would most-likely be IP.Board. Due to the fact I have dealt with the software for a number of years now and it has rarely failed to impress. Although, I have a word of warning; IP.Board being the most common forum software of choice, can be somewhat dangerous e.g security will be a lot more 'exploitable'. For example, take Microsoft. Windows is the most common operating system in the world, and around 90% of the PC population use Windows as an operating system (I wouldn't quote me on that). Meaning if I was a person who wanted to place a PC virus in a piece of software, I would place the "virus" in a piece of software which was compatible with Windows and not another operating system such as OS X (hence why Macintosh computers are a lot less prone to the common PC virus).
And finally, I always suggest investing in a custom skin when choosing IP.Board as your forum software as choice. It's the "cherry on the icing" which will make your forum somewhat more unique that say an IP.Board forum which has implemented a skin which has already been created and is open to the public for a small fee.