I doubt Denon would be an improvement, but for 1000 bucks (Cdn or US?) you MUST audition some integrated amps! Even lower-priced units by Cambridge Audio, Antique Sound Labs, Jolida, Arcam or Parasound can make a night-and-day difference in how your system sounds.

If you're happy with the HK stick with it. Otherwise have a blast auditioning gear at specialty shops.