There are dangers in directors becoming involved in the nitty-gritty of technology. Many companies prefer to outsource their IT, but there can be dangers here, too. You need to know that your supplier is up to the mark. You need to do incredibly careful referencing and make sure you're not their least important customer. Directors also need to consider IT when making acquisitions.
Systems integration is one of the things people leave till last.
You think about the people and the financial issues. But understanding the level of your system's capability and theirs, and whether they are compatible is really important.