I'm still in the experimenting phase with sous vide, and I've had some successes and one meh outcome with steaks. I'm actually kind of caught in the middle between marinate and grill or season and sous vide.
Last night was my meh outcome -- I marinated a tenderloin in Dale's, then dried it, and then did sous vide (135F for 50 minutes). I got zero of the wonderful Dale's flavor. The steak was still good, but it would have been better grilled.
Prior to that, however, I used sous vide for some Costco NY strips. Just simple salt/pepper seasoning, SV at 133F for two hours (steaks were almost 2" thick) and then seared on the stove. They were amazing!
The great thing about sous vide and steaks is that you get the same doneness edge to edge -- which should work well for filet, as
@Skippy918 suggested above. Here's what the NY strips looked like.
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