Sorry to hear about your issues.
I've had a few stutters myself. Can last from 10ths of seconds, up to few seconds. But at worst, only a couple of stutters per game session.
A stutter for me is when game freezes, then restarts. Problem of course, is you're driving during that freeze, so you could have driven into a wall instead of round a corner during that freeze.
However, most of my sessions I haven't had single stutter.
Maybe it's not a Rift issue.
Maybe the fact that you need 3 x USB3.0 connections just to run the Rift. That, and like me, you've probably got other USB connections for peripherals.
Me, I've got separate USB connections for a mouse, keyboard, wireless dongle, external speakers and G25 wheel. Unfortunately, my mouse and keyboard aren't a set so I need different usb receiver for both.
And I've got both my Rift and my tv connected via HDMI to my single graphix card.
A fairly expensive way to test if possible usb issue would be to buy a powered USB3.0 hub, and plug the Rift and sensors into that, and plug the hub into a USB3.0 port on your pc.
Longshot - if you knew someone else who had a Rift, and tried theirs, just to see if you have bad headset.
I've just looked at the video I made "Armco Canyon" that I put on Youtube, but not a single thing wrong that I can see anywhere, although to be fair, it's a very short video.
Can you record what you're seeing on the Rift? If so, does the recording look better that you're seeing on Rift? I use Plays.tv to record LFS. Can be set to record every session automatically. Or maybe look at spr replay?