I went a slightly different route and got the Zimbale 18 liter bag. Very similar to the Carradice's, I have to admit I was originally swayed by disliking the white leather trim on the black Carradice's. My Zimbale is holding up excellently and made quite well.

I do also have a Carradice Cape Roll, although I use it rarely, I love it for what it is, a great bit of kit. Likewise the SQR bag support, it makes removing my bag everyday a breeze! Totally worth the $.