I have a Seyco that I am very satisfied with. They are a little harder to assemble that the King or Excalibur, but if you watch Steve Good's video on assembly, it really helps. Even I could accomplish it!! The only negatives about them that I know of are: one, there is a hole in the table about midway back. It allows for clearance for some part of the swivel mechanism.... or something and it can protrude above the table just high enough to mark the magnetic cover. Too fix it thin washers can be put between the table top and the body of the saw,,very easy. The second con for some is the head will only tilt 30degrees or so... some people require up to 45 degrees of tilt.
I did not care for the magnetic top cover so I gave it to Heppnerguy to play with.. But to me it is not a pro or con, just personal preference.
Thought of one other thing,,, the Excalibur has a knob you turn to tilt the head,,, Seyco you push it. I do not know if good or bad, I haven't tilted the head on my Seyco yet, but it seems to me the knob turning would be better for ease of adjusting,,,, maybe, maybe not.