Toss up in my opinion. My 43 was red-headed for awhile, but they shift back and forth. They are all so good that they see their days on my cameras, and recently actually, the 43 is enjoying a bit of a renaissance.
It's been on my cam for a couple weeks now, while the 31 wonders what it did wrong. Nothing... it did nothing wrong. I just don't have enough love for ALL of you at once sweethearts.
I guess I'd actually suggest the K3 as well, but that being said, I don't see myself replacing my K3 with any subsequent model for a VERY long time. This is partially because I've come to believe that digital cams are 10% tech improvements and 90% hustle... And I've been shooting so much film the past year, it's a really a novel situation that the K3 even comes out with me anymore ever, particularly when a GR is sitting in my backpack at all times.
Make whatever sense you can out of this rambling addition to your questioning thread...