I was picking up my new speakers yesterday and had the opportunity to audition the Amphion Argon 2s. I must say that at this pricepoint, they are certainly impressive. Very solid imaging and spacialness with great dynamics for such a small cabinet. Anyway, they are well worth checking out if you are looking for a 2 way monitor.
Haven't heard the Argon 2 but I have the Helium 2 and they resolve like no other while at the same time being very nuetral. Really hard to beat under 2K from the speakers I have heard. Sounds like the whole line has a lot of strengths.