Has anyone had any experience with this unit? I am debating between this unit or buying the Denon 4311. I understand that the Denon is a receiver and the Onkyo is a pre-pro. However, the Denon 4311 has the option of switching the unit to become a pre-pro when hooked to an external amp. I would love to buy a Krell or Mcintosh pre-pro, but they do not support hdmi 1.4 or have bells and whistles like ipod hook up. If I am wrong, please correct me. Last question, do amps sound different with different pre-pros? Meaning, if I would buy a Krell amp, would it sound or perform better or worse with the above mentioned units? Thanks