I have the opportunity to buy a 2008 Look 555 for £900 (RRP is £1300) Now I have been looking at Look Carbon and tried a 585. The 585 is impressive but I don't really want to spend that amount of money. Should I go for the 555? Same geometry, same forks, different carbon, alu BB shell and about 135g heavier. The 555 doesn't set my pulse racing but I don't really know if any bike truely will. My other option is a Burls Custom Ti for about £250 extra but the extra weight (a whole 300g) is putting me off. I'm a crap climber and need all the help I can get. What should I do?