FWIW, here's my method for SV steaks. It's what I use when I want to "hold" the steaks for some reason (arriving guests, side dish preparation or such). Also, I don't normally reverse sear because I'm of the opinion that searing after smoking burns off the smoke flavor from the steak's surface, but it's necessary after SV in this sequence.
Doneness will vary as you vary the length of sear time and the SV temperature. Experiment.
Season and refrigerate
Sear in a 350°F cast iron for 45 seconds (use a stopwatch) [1]
Cold smoke
SV cook at 135°F
Pat dry (very important)
Sear again for 30 seconds [2]
[1] Oil or butter increases the browning.
I sear steaks before cooking them SV because cold steaks brown without cooking and it rapidly kills bacteria where they are most likely to be found—on the steak's surface.
350°F is suitable for browning meat. Above 355°F a different set of reactions occur: pyrolysis, also known as burning. With pyrolysis comes bitterness. The black compounds that pyrolysis creates also may be carcinogenic, so go easy on charring your foods for visual appeal.
Also, I think the Maillard flavor increases during SV cooking. It would be difficult to prove, though.
[2] Sous vide cooking softens the first browning. The second sear is required to make it crisp again.
3/11/19 EDIT: I've abandoned this method. I kept adding steps in an attempt to overcome cooking while smoking and it got too complicated.