As far as cutting tables go, I would recommend having it like at waiste high,or what is comfortable for you to stand at and cut. And here is a link to show you something else I would recommend,which i had put into my sewing counters.
http://www.quiltingboard.com/t-132670-1.htm
Slots cut in the counter top for scraps and snippets to go to. Once mine is finished there will be hooks under there to place plastic bags like you get at the groc store onto to catch it, when full I can just grab it and toss out.May not be for everyone but, this is something that will save me alot of time and clutter.lol Have fun on your new sewing space!