Krell is MUCH more expensive gear than Arcam generally, though there is some overlap between Arcam's high end and Krell's entry level stuff. Arcam gives great sonic/video value for dollar. Only you - through personal auditions - can decide if Krell offers you enough more to justify the price. Don't let any salesperson psych you out by bad mouthing your Arcam stuff as "mid-fi" or any such nonsense. For most people in most circumstances, it is great equipment.