Riding to Spain on a track bike. Yay or Nay?

Something else to consider, I dont know how many hills you are planning to go over, but me and my mates rode with back packs rather than panniers. Why spend money on a light bike just to weigh it down. Get the weight off the bike, up the hills it makes a huge difference.

I think this is mental.

The amount of weight your taking up the hill doesn't decrease once it's on your (sweaty & aching) back.