Thanks for asking ahead!
The Toshiba Satellite A665 is a nice laptop - plenty of horsepower for USB graphics with its Core i5/7 class processor.
Assuming you’ll have all monitors connected through USB (so you have single-cable docking to the 3 external monitors), you’ll want:
1 Plugable UD-160-A laptop dock http://plugable.com/products/ud-160-a/
2 Plugable UGA-2K-A or UGA-165 adapters [http://plugable.com/products/uga-165/…](http://plugable.com/products/uga-165/(the) only difference between the two is maximum resolution; both can support 1920x1080).
And as long as you have VGA or DVI connectors on every monitor, and they’re all 1920x1080 or lower resolution (which I believe is the case), you’ll just plug the two graphics adapters into the dock, and have single-USB-cable connectivity back to the laptop.
In terms of audio, we use the C-Media CM6300 chipset. Here’s the full specs: http://www.cmedia.com.tw/ProductsDeta…
One thing to note about the audio is it’s set for high-power output (for unpowered speakers). For people with amplifiers and powered speakers, that sometimes causes frustration with adjustability of volume. Check out this post for solutions: http://plugable.com/2010/10/28/howto-…
In terms of audio quality, USB audio on Windows is good for consumer use, but it’s not targeted at professional use. Latencies that most people wouldn’t notice, get noticed in the more professional use cases.
And in terms of running audio with 3 monitors - USB audio uses isoch transfers, which actually reserve bandwidth on the USB bus. So when the bus is constrained (which can easily happen in short bursts), the audio will effectively get priority over video (DIsplayLink graphics uses bulk transfers, which are scheduled by USB on an as available basis)-- so you’ll notice video lags before hearing any audio effects.
Hope that background helps. Thanks again!