I honestly am only really a fan of Red Dragon, because the others strayed a little too far into the realms of unbelievable for me. But Red Dragon was spot on - hell, even Bob Keppel gave it a nod of approval, and he generally regards any fiction involving law enforcement/FBI as crap.
(Funniest thing ever is listening to one of your highly regarded Professors spend half a lecture period railing against the evils of CSI, seriously.)