Would you be able to comfortably ride single track all day long? As said this will be for touring, half of which will be off road so I need something that I can comfortably do all day, not something that will get my heart going so much that I'd have to stop after a while.

If it's possible to get to that stage of comfort with drops them I'll prob buy a cheap second hand bike and try to get used to them.

Also how hard is it to fit a second set of brake levers (and gear change although I geuss thats probably more tricky) on the centre of the bars?