Xylotex was the best investment I made when I built my router, But my machine is not as big as the one your planning. If mine was as big as what your planning I'd go with servos. But you also need a lot of rigidity to use the power and speed of servos. I use ballscrews & linear bearings on mine it will do 60 ipm all day long. I could easily change the steps and go twice as fast but my router would not handle it unless I went with lighter cuts.