So, I'm sz. 9 feet, wide, with very high arches. I can feel part of your pain. However, my mom is sz. 6, double wide, with high arches, so maybe even more than you'd expect?
AGLs are very comfy, Una. You probably do want to seriously consider them, especially if you are considering getting just two pairs of shoes. I also find Franco Sartos to always be much more comfortable than they seem like they should be. I have had great luck for comfort with Naturalizers. I haven't had great luck for wear for serious hard core wear with Naturalizers. They will last a season, but not much more. However, that may be just want you need to get you time to know what you can wear and what you want to wear. Also, what about these rockports?
http://vip.zappos.com/rockport.....row-patent
How wide are your feet? Single wide? Or double wide? (My mom's are double wide.) What elfin size do you need? (I know you have tiny feet!)
Elle: AGL are Attilio Giusti Leombruni (you can see why everyone calls them AGLs!!!) Here they are at Nordstrom.
ETA: Una, would you consider these? http://shop.nordstrom.com/s/at.....s-_-1_13_C The black and metallic will let them cover both bases for black and taupe for you. I'm not super fond of the style, but just thought I should list them.