When I first go my N7 I really wanted to keep it stock JB, especially since I've got some reviews to write up on the N7, but alas, it was too restrictive in a number of ways.
First step was to change the launcher to Apex.
Then found a few other shortcomings and the way I normally find alternative roms is look at the number of views on the XDA threads.
Paranoid Android had the highest views and suits what I wanted perfectly. The fact that I can change the DPI of almost any component independently is great, means I don't have to do the global DPI hack ( my eyes aren't as good as they used to be)