i love my Sigma 105mm EX DG Macro, although it isnt permanently attached to my camera in my bag (my 17-85 IS USM (the "bypass" to the 18-55) is my "permanent" lens) it is always in my bag ready to be changed, and i wouldnt go out without it.

Reasons: love the world of macro, it takes a crisp clear shot, it gets 1:1 magnification and i havent had any problems with it (so far) in terms of quality.

On a side note - the Canon 18-55 isnt that bad, especially for how much it is worth!

"In every colour, there's the light.
In every stone sleeps a crystal.
Remember the Shaman, when he used to say:
Man is the dream of the Dolphin"

Rich Meadows Photography