I usually read thru all the responses before replying but don't have time today. Seems like you have a lot of possibilities. But let me give you mine. I got a 6"x30" table and the bed risers. Then had plywood cut to 30" wide by 8' long (but any length is ok) I have a cutting mat that covers the entire top 30"x72"
Another possibility is have one made. There is an interesting plans on Mark Lipinski's blog. I don't have the exact address but if you will go on his site and look. It is a good sturdy table and looks good.