I am an Olfa Frosted Ruler fan and I couldn't live without my 6" X 24" one! I am not a fan of the Omni grids as I think the lines are too thick and it is too busy (lots of lines) I like the frosted because it makes the ruler less shiny but I can see my fabric perfectly through it. Also, I am a big fan of the June Taylor Shape Cut, although I have only used it to cut strips. (I have the Accuquilt Go with the strip dies and I have yet to use them. Find myself always pulling out my June Taylor!
http://www.joann.com/olfa-frosted-ru...-x24-/prd9818/
http://www.joann.com/shape-cut-sprin...prd_10560019a/
Use coupons on them at Joann's or Hancocks, never pay full price for a ruler! (or anything else, if you can help it!!!)