As for lenses, take a look here at Bob Atkins LensPlay http://www.lensplay.com/lenses/lens_query.php
Great realistic reviews of lenses, he really tells it like it is. Canon makes some really great less expensive lenses, that do a great job. I actually still use my 18-55 kit lens, just shoot it at above F5.6 and it works really well.
If you ever do invest in a macro lens The Canon 100mm one with or without IS is great although without its $700 cheaper! Plus it works great on Flowers and bugs as well, If you happen to like taking images of them too.
But do try the lightbox, it makes things much easier.