Thank you all for the suggestions. I really wanted to get some feedback from people who actually used a cutting mat other than Olfa since they don't have a bigger size than mine. It is just a cutting mat but I don't want to spend $$$ on a mat that won't last more than couple of years. I have had my biggest olfa for about three years and it is like new but the shifting of the 3 pieces and the cutter going in between is just driving me nuts. Still my reason for buying a bigger one is because I am ordering a custom made cutting table and want to order the mat first so the table is exactly the same size.
Thank you all again. You have been great ;-)