[ianj]

Hi Kev,

I use the CAnon EF-S 60mm macro for photographing moths and some of the larger insects. The only problem is that because of the short-ish focal length, you need to get pretty close to your subject which can be a difficult at times for some butterflies, dragonflies, etc. Other than that, the image quality is superb and the internal focusing is very fast. You might consider looking at the more expensive Sigma 105mm f2.8 EXDG macro or the Canon EF100 f2.8 macro. I have used both and they both excellent for macro photography, and you don't need to get so close to the subject.
Also, I was very disappointed with the Canon EF 90-300mm lens. It was my first telephoto, which I used with my original 300D, and soon sold it, as it it couldn't give me the image quality I was after. I would be tempted to save for a bit and get one of Canon's L series lenses. Mind you, once you go to 'L', you don't look back!
cheers
Ian