There are a lot of themes to choose from. Some are "light" while others are graphically intense.
I'd recommend that you subscribe to a few of the the sites offering theme announcements, so you can be informed as and when new themes are released.
I'm currently having a similar issue with my own blog.. I want a theme that is "just right", but am having problems getting one. ...
Apart from the purely visual aspects of it you should also consider what it supports ie. plugins and advertising etc., |