PLus side in using a backer or stack cutting no matter what blade you use, is the middle piece will be fuzz free and splinter free from being sandwhich, I think that what most do and use the center cut project as the final. The top one even maybe fuzz, splinter free since it will have a backer as well from the second. Your backer cna be any type of wood, if you plan on chunking the backer anyway get the cheapest stuff since it will may have tear out splinters of alot of fuzz from cutting.
Lowes or Home depot has some cheap venner plywood that cost about 4 bucks for a 2x4 sheet.