Totally agreed on the comments regarding excel. You're better off starting out this way. Scrum can be a bit of a culture shock if you're coming from a waterfall methodology. Making sure your team understands the philosophy first is way more important than the tooling you choose to make it more efficient.
Scrum just seems to work best when you have tangible things (a sticky note, a piece of paper) representing an asset you're building. It's simple, straightforward, and everyone can get their heads around it. Sometimes, your intent, or work items themselves, get lost or misinterpreted when all your tasks are abstracted by storing them in a database somewhere, especially if the team is new to Scrum.
Right now, my team is doing Scrum with Team System. It's great because we get management and team reports for free. However, and this is the important thing, I think we actually did things faster and with higher quality when we did everything with an old-fashioned corkboard, excel and this template (I love this thing, recommend it to everyone doing Scrum):
http://blog.crisp.se/henrikkniberg/2007/12/18/1197973740000.html