Mosmatic for the win. I had a few others but had to convert all of them to mosmatic swivels.. the mear fact that their seals never blow out and work consistantly make them worth the little extra money spent... the rest will leak by the end of one season, and then youll have to rebuild them..
as for the tips, you can alway purchase diffferent tips to fit your machine.. if you are under 5gpm, make sure you go with a 2 head spinner.. the tri head spinners sound fun, but they split the GPM too much and make the surface cleaner pretty much worthless for lack of actual pressure.. the 3 heads just splits it up to much so you have almost 1gpm or so coming out each head and a pathetic cleaner..