I've recently bought a Canon Digital Rebel XT, which came with the "kit" lens. I was originally looking for a Nikon D50, but seeing both next to each other, I eventually chose the Canon for somethign like $60 more.  Hopefully I made the right choice here. :)

Anyways, I was wondering what everyone would recommend as "necessity" lenses and if there are any lower cost lenses I could consider. For example, I do like macro photography. I see on Canons site they have a macro lens for $599. Ouch! I know, I should be prepared for this. I primarily like to do macro and landscape type shots. Not much into portrait shots.

Any suggestions would be extremely helpful.

Thanks!