Manuel,
It sounds like you got a lot more speakers than what you paid for. Good for you! Judging from the subs, it seems that the IP2000 is comparable to the Maui 28, but still $500 cheaper. I got my Maui speakers at dealer cost through a dealer friend, but when I saw the IP500, I was interested in it because my Maui 11 column speaker does not split in two and it is a little cumbersome to carry it. Sweetwater told me that none of the IP series comes with a split column speaker, either. If that's not an issue, the IP series seem to be a very good choice. I noticed that they have great reviews, too.