I've listened to Helicon 400 with smaller integrated amp from Sim Auido that sounded fantastic. If you are concerned about too much bass then you should be looking at room treatments.
If you are leaning toward monitors I think you need more power to get the best sound. For example, my musical fidelity A308 amp is rated at 250 watts per channel, and can deliver blockbusting current with low distortion. I pair this with Vienna Acoustic Haydns. My McIntosh MC275 amps rated at 75 watts is run in mono with upgraded tubes approaches 190 watts. It is paired with the Dali Helicon 300.
Enjoy the journey.
If you are leaning toward monitors I think you need more power to get the best sound. For example, my musical fidelity A308 amp is rated at 250 watts per channel, and can deliver blockbusting current with low distortion. I pair this with Vienna Acoustic Haydns. My McIntosh MC275 amps rated at 75 watts is run in mono with upgraded tubes approaches 190 watts. It is paired with the Dali Helicon 300.
Enjoy the journey.