My reasons for ordering a Tascam DR-680Mkii are threefold. Firstly, its a stand-alone piece of kit so I can move it around, my Reel-to-Reels (stereo only ) are in another room, and most of my other analogue kit is as well, and is simple to connect. Secondly no software compatibility issues, I can easily plug the SDcards into my PCs or laptop, and it allegedly connects via USB as well (I suspect you can only see the memory card), and thirdly, new amps etc. no longer have multichannel inputs, and a lot now have no multichannel outputs either, so it allows me to 'play about' independently of the amp. A plus having run into big issues with my NUC on HDMI 2.0/HDCP 2.2 and my amp which only handles HDMI 1.4/HDCP 1.4 so no video or sound unless I go through the Oppo (HDMI HDCP converters don't work)! Plus the Tascam is a 'reasonable' price. I may get a 'proper' multi-channel PC interface later when I'm more in the mood for some frustrationI'm definitely intrigued by that Tascam, the price is reasonable also IMO, the SD cards are an extra cost, but my Computer has built-in slots for those and I've had some Tascam gear in the past that was decent.
I've got a new MOTU UltraLite-mk4 I use with Win. 7 Pro. via USB 2.0; just started learning this sort of transfer, so I have limited experience to relay here on this thread. I've just been converting direct analog from my Surround Master v2 and out USB to the computer to make Up-mixes. Hopefully some conversions from QS/SQ and CD-4's in the future. So far so good. The only glitch I've had was having several apps open at once (i.e. AA3, Audacity & Foobar200) and something tied up the audio for monitoring and I wasn't getting any sound. Had to shut everything down and re-boot and it was fine again. Just a re-boot can do wonders (but yeah, still a hassle.)
I'm a little nervous about Microsoft shutting off support for Win. 7; because it's been a decent OS for me. However the Wasapi sound drivers for multi-channel are a joke IMO; just can't get it to work with the apps.