You could probably take the header and welcome panel to another level. I don't think it fits in quite well with the logo and the other graphics...
How do I edit the welcome panel? There isn't an image for it or anything...
*confused snowy*
In the theme editor: Top Links Menu, Welcome Panel
In the template editor: header
header_welcomeblock_guest
header_welcomeblock_member
header_welcomeblock_member_admin