I'd grab the extra 2' if you can. 8' sheets of plywood aren't the only thing you'll try to rip[ on your table saw. You'll have 8' to 9' boards that you're ripping or jointing and the extra couple of feet could be important. Something to rememebr is that you could do a 10' board if you slightly angle the saw/jointer so you're temporarily working on the diagonal. Having everything on castors makes that possible.