Well, if i may add to this, we run only wood (except for when making fixtures) and we use 3 flute, up spiral router bits, in both solid wood and particle board etc... It really depends on what you're looking for in a cut. If you can, use a hogging or roughing bit for the first material removal operation. Be sure to leave 40 thou or so on the perimeter (x,y axis) and then use a straight flute bit to go back over and put a "finishing" pass on the part. A rougher with serrated flutes can FLY through alot of wood fast, very quietly, and with much less cutting force pulling on the part. Check out
www.amanatool.com, they don't sell direct, but look through their CNC tooling stuff. Also, if you can use a bigger bit, the better off you'll be. Especially for roughing. You can rough it with a larger tool, then finish it with a smaller tool. Hope that gives you some new ideas to think of "outside" the normal thoughts