Matinee looks really good fun and Amnesia is definitely worth going to. The thing that stops me wanting to go is the music at Matinee, it just sounds a bit bobbins really!!! Really cheap sounding (electro) house. If you go on their website, it gives you a taste.
I've been to Pacha on Saturday night every time I've been to Ibiza. Never been to Defected but it used to be Def Mix and David Morales is on Saturday 5th. He's always been good when I've seen him there, just good quality, good time, vocal and straight up house with the odd bit of deepness thrown in for dramatic effect!!! Might go myself!