Hey all - I wound up picking my things up today. I opted for Deep Dark Brunette for the f/l but then went for Brunette in the pencil to mix things up. DDB is much warmer looking on me than the Brunette pencil, which is much cooler. This way I can get a few different effects.
So far I feel better using Brunette pencil just at the lower edge to define, then using the brush to brush it up into the hairs, and then for a sharper look, adding DDB to define inside and for the arch - that minimizes the warm tone.
I've been used to using the Penultimate Brow marker, which sets into a rather cool dark color on me, so the combo of Brunette pencil and DDB f/l gives me something like what I'm used to; or I can use them separately for other looks.
I'm still going to be using my usual Dark Diversion in the brows too, but it doesn't last anywhere near as long as the brow f/l formula.