This is just a quick update because I've had the chance to compare the Neutron Five system to some Dynaudio BM5A Mk2 active speakers. I almost bought these Dynaudio speakers three months ago (with a TC Electronics DAC) which would have cost a bit more than the Neutrons.
In comparison the Dynaudios sound a bit brighter and have a bit more detail but the Neutrons still come very close to matching the Dynaudios level of detail dispite having a passive crossover. The Neutrons definitely have the best overall sound though, they're more natural and the bass is much deeper and solid thanks to the 10" sub which makes such a big difference. The Dynaudios are great speakers but it was definitly the right choice to buy the Neutrons. Another bonus with them is that they sound good when placed close to a wall.
PC - AVI Neutron Five 2.1 - Atacama Nexus