I have done a lot of hours recording things with Midas desks and the DN9696 and it's my favorite choice when it comes to simplicity and 'idiot proof'. If it works.... The unit is basically a simple dualcore computer with of the shelf motherboard and harddisks, KT fitted it with two PCI - AES50 cards wich also handle the frontpanel leds and knobs and put all of this in a 5U rackmount. While this setup was great in 2007, today it's not. Certainly not for the 14000 Evan mentioned.
The major downside to this device is the use of general harddisks and the recordingsoftware. Every harddisk has a moment where its stops writing stuff due to bad sectors or because its thinking about life as a harddisk and its dead end future. Usually this only takes seconds and then everything is back to normal and you can overcome this sudden hickup in your datastream with buffering (to ram). Sadly the software doesn't do buffering. And then there is the lack of support because the company who manufatured the AES cards and software went bankrupt. KT did buy their technology, but there hasn't been a softwareupdate to address minor or major bugs. I have been told the unit is discontinued and i'm suprised its still on their website....
As for (cheaper) alternatives I like the KT9650 bridge with a laptop. Based on the rest of you equipment you should choose between MADI or Dante. (if you have other madi consoles i'd choose madi) Take a laptop with your favorite program and you can record up to 32(dante) or 64(madi) channels. The Digico UB-MADI is a simple USB 'soundcard', but it's limited to the first 48 channels of the madi-stream. Fit the laptop with the biggest SSD you can afford and you will not have any regrets.
I also used the JoeCo blackbox, but the first times wheren't that succesfull. Due to a difference in madi-protocols the unit would not clock to the DN9650, using the opticalport instead of the coax fixed this. This has been addressed in an update by JoeCo and since then both optical and coax are fine. In my opinion the JoeCo solution lacks in the userinterface department. It has one knob and you do everything with it, setting names or arming/disarming tracks takes ages. It reminds me of the
Macbook Wheel
You can also fit a computer with Lynx AES-16e50 cards, at 1000.- a piece they aren't that expensive. Although I haven't used them for recording they are fine for things like external effects in Waves Multirack. If you really want a laptop it's possible to fit the card in a PCIe-thunderbolt box, but then you are limited to MacOSX. I don't have enough handson experience to recommend this solution. The RPM products are nothing more than the above mentioned card with a Magma PCIe-thunderbolt chassis and some ethercons.