I took a second look at BitFinix and frankly it leaves a lot to be desired, there is a lot of risk inherent to their model with swaps, etc. Also, as someone who has run several online businesses, I am extremely suspect of places that don't provide a phone number I can just call up. I know this is currently standard practice in the crypto world, but Finix is incorporated in the UK (no license), and operates out of Hong Kong. Again, from long experience, and not trying to offend anyone, you are not likely to recover your money in Hong Kong if things go south, plus as far as I can tell, ownership is not public (I might be wrong on this but I can't find the real name and country of residence of whoever owns Finix).
You know, it's really concerning, buying any sort of volume of Dash requires a substantial assumption of risk. I read a couple of threads on here here people "picked up a couple of Master Nodes" on dips or what not; but I have no clue how they did it (maybe it's just talk?). Picking up a single node on Finix or Cryptsy would spike the market noticeably, let alone picking up 3-5. you would be your own bubble and would be pricing yourself out of your purchase: that is assuming there was enough depth for you to place said order in the first place.
I think that the next logical step is for someone to set up a proper Dash exchange; we need to fill the function that Gox filled for BTC in the early days. As it stands now I'm gonna have to use Shapeshhift (haven't tried them yet but word of mouth seems good) and perhaps offset a bit on Cryptsy. Regardless, not a good way to pick up a few MN.
Pablo.