Can only comment on power amps from Arcam and Rotel: They generally make the current purer, which roughly equates to a cleaner, tighter sound, especially in the mids and lower frequency depts. It should also have more control over harder to drive speakers. However, I think the Kandy power amp is the same wattage as the integrated, so there won't be any increase in power. There certainly won't be a 'night and day' difference but should, nevertheless, be pleasing.