^ I think a darker brown would "fit in" a bit better, but whether or not that's a good thing is up to you. I just popped into my local Mulberry store over the weekend, and their Oak color (I think that's what it was; it's the lighter brown that they sell) was gorgeous, and I would definitely choose it over their darker brown.
Suede on a bad weather boot? I don't think so, Tim. Anyway, I'm excited to see that Ruby brogue for the first time. The Austerity bal boot looks pretty killer, and I'll almost definitely pick one up if we do a run in Ruby as mentioned earlier.