A couple years ago I purchased the canon xsi with EFS 18-55mm lense. I have children and we are an active family who enjoys yearly trips to Costa Rica, children play hockey and dance. I would like to expand on my purchase and get a new lense. Preferably one with better zoom, good macro, stable, lightweight and durable yet not going to rob the bank. We head for our vacation in January and I'd love to bring a new lense this time. Not to mention hockey and dance have started! Suggestions please I am not anything close to a photographer (or i wouldnt be asking for advice) but I appreciate a great shot. Thank you!