Flame for wad? :bsmilie:
Well, u've got what it takes liaoz. Fujifilm F10, 17-40L. Why waste more money?
If u really lazy to change lens for travel, juz get the EF-S 17-85 and bring it all for ur trips. If u require a little extra reach, shoot at 85mm and juz crop the images abit to produce an 'artificial zoom'.
I reckon u're going on a tour package? Den it makes things even worse I guess. Lotsa rushing and I dun think u've got time to sit there, slowly see, compose, set and fire. Its gonna be a 'one-shot, one-kill' thing. U miss the shot, that's it.
Instead of getting new cameras (which u'll be taking a gamble of getting bad shots), I'd rather u stick to what u have now and brush up on ur speed in street shooting instead from now till the day u fly.
But if u really think u must spend money on lenses before u fly, get the 17-85, fix it to ur cam, bring a flash and solve all ur problems.

Even when travelling alone to Japan, there are only 2 photos which I thought a longer zoom would be useful. The rest of the time, I was shooting purely on a 18mm to 70mm range.