Gregg,
Give James a call and he will tell you all you need to know. Fr me it is hard to imagine the Argos having any qualities that the Vixen does not have. I'm sure it may be a little faster but the Vixen ( I have his Misty Dawn and Morningstar also) is still my favorite bow I have ever had the pleasure of owning or shooting. My Vixen has fantastic cast, no Handshock , very very point able and just overall beautiful. Now with that said the more I shoot the Morningstar the more and more I am loving it.
Like I said earlier, give James a call and he will tell you the pros and cons of his designs.
Good luck , and you cannot go wrong with a Berry