If you need a portable saw, the Bosche portable contractor units are the best available right now. I looked for a long time and came to these. They have superb fences also, that always lock to absolute perfect square(unlike most stock fences). The stock fence system does not need to be replaced. The table has some great extension accessories available(which I recommend as necessary, not optional) to increase the right side and rear side area for larger stock stability. The saw's right side extends/slides out to make very wide cuts(and maintains the dead accurate on saw measure indicator while extended). You can get a digital option that gives absolute accurate digital read out values for the cut (once you calibrate it of course). The stock analog indicator is great as well. Build quality is great and the motor is very strong. The quality of the fold up cart is one of the best, if not the best out there. Almost all other contractor units are toys in comparison; the only one that comes close is the premium Rigid contractor saw. But the Rigid's fence is not great (does not true up to perfect 90 degree easily) and the measure indicator on the Rigid is horrible (it shifts easily; as it's a loosely rabbeted piece of tape measure over rollers, that extends out when you extend the right side of the saw - but it shift about 1/16" either way(!)).
-Chris