As acantor said, I would also be tempted to have a slightly larger biggest chainring. I've got a 44/34/24 chainring setup, and I understand what you mean about spending most time in the middle ring - but sometimes it's nice to have the longer top-end ratios for pedalling along slowly on a descent or with a tailwind (they DO happen sometimes). Or when I'm not loaded (the bike, that is!) after setting up camp and just heading to the pub for dinner or something.