Red John is none of the suspects, is the one we never expected. RJ is Patrick Jane, he has 'Dissociative identity disorder', that is how he had the same names that the DVD and why RJ was able to steal his 'happy memory'. Lorelai really loved Jane, they have this 'connection' and that is why she did the recording on the DVD.
Ask yourselves, how Patrick Jane can solve every case and never the ones when Red John is involved.