Which Saw movie is the best so far?

I've been watching horror movies since i was 9 and shockingly as long as the SAWs have been out I've only seen one of them all the way threw I'm planing to eventually watch them all anyways does it matter if you watch them in order i mean other than the fact that if you watch some one get killed and then you see them alive in an earlier movie type of thing i mean theirs like no underlining plot where you have to watch all the movies in order is their? Cause i was watching these clips on how some props were made and it made me want to skip strait to the new movie instead of rent 1-present SAW V and SAW IV look really good so I'm very interested so whats your say on the subject?Which is the best which is the worst should i watch them in order? i need all the help i can get on this question i have friends that are obsessed with these movies and i really can't trust their opinions because they don't know anything about horror unlike you guys