done

I went for the 'climber' in the end. It has more features, it's cheaper, I might as well. I'm fine with having a semi-bulky set of keys so it's done. I had help, I have to admit, I had drawn out on a piece of paper the two sizes and laid my keys beside them and then asked my boss for her opinion. She was without a doubt in the more-bang-for-your buck camp, or maybe it was the bottle opener that swayed her... ;-) And I've gone for classic red, you can't argue with classic and as a bonus, the red will make my knife go faster. (Don't ask.)