The DC04 is nice to use yes, the main problem I find with the DC07 is its extreme noise, which is made louder by the external cyclones that point upwards - de-rooted ones are even louder. The DC04 is much quieter than the DC07 unless the brushroll housings are worn which is worse on the clutchless models.
Most clutched models of older Dc07's and all DC04's will now need clutch belt replacements though as the old belts stretch over time and the brushroll will end up slowing up or stopping altogether when used on carpet. People don't think about this when buying old Dyson uprights with clutches, and replacing the clutch belts is a complicated task, especially the belt from the clutch to the brushroll.