The 5.7L HEMI is a great motor. I stand behind that 100%! The only issue with it, at least in the Ram trucks, is it is a major gas pig. Actually not too bad in the Charger.
BTW - our State Police dept has gone to the Charger as have many local PD's and they are experiencing no more repair problems than they have with Ford or Chevy according to the Officers I have asked( I am not shy about walking up to an Officer and asking ). The Dodge dealer I use handles a lot of the repair work on them for local PD's and even the State at times and after reading comments like this on here from a couple guys( Dodge bias? )I asked if the Chargers used as cruisers have had a lot of problems. There have been few if any problems with the Chargers they service for various PD's( more than 100 ). The Officers I have spoken to about the Chargers tell me they love them as well.