I recently built a four tap keezer. I prefer to do things once and do them right even if it cost me a bit more in the beginning. I thought that doing the 575ss for all of my taps was the way to go, but now I am unsure. I have never used the 525ss, but I think it may be better if you are going to have friends over a lot. I find that my friends have trouble getting the tap in the closed position once they have had a few beers. It seems that the 525ss is a no brainer for this. I like the creamer function of the 575ss, but in hindsight I think I would go with the 525ss.