I had a look on the competitors of the Qu 16, XR18 from Behringer, Mackie DL1608 and Soundcraft Ui16.
All the competition is cheaper, but lacks a lot of very cool features on the Qu 16.
Main thing is: display on the rack mixer, this allows control over the mixer with the onboard controls. Also its possible to do multitrack recording on the Qu 16 on a USB hard drive. (48 Khz sample rate.)
The competion allows only the stereo sum on the mixer. (Soundcraft -> usb drive.) Also the XR18 does only stereo recording. But its possible to use it as multitrack recorder via USB and computer.
I wouldnt worry about the latency - i would record multitrack directly to the mixer. I think latency would be an issue, if you would add stereo returns from the DAW to use vst plugins. You would need a very low latency from your audio interface.
I think for what is in the Qu , its a fair price tag, and more than worth it, because you may not need other equipment running with it.
The behringer has the X touch console , which you can add to the rack mixer, via ethernet - if you add that to the price of the mixer, you are close to the Qu 16 rack.
(now i want a Qu 16.)