I think the Tc looks pretty nice but I have not seen one in person yet (only pictures) and I have not driven one yet.
The Tc is only just now starting to roll into dealerships around the country and many places already have a waiting list for them right now.
If you check out the forums over at
http://www.scionlife.com you can get an idea of the type of people that are buying them and what type of mods they are planning.