tlyee63,
In the machine description it states that the Y & Z Axis' use unsupported rails. Unsupported rails are not as "rigid" and more prone to flex than supported rails. I don't know this machine but those are a weak link. I suppose it depends upon what you plan on cutting with your machine. Also, depending upon the "thickness" of your cutting table (which you'll have to add), your Z-Axis travel will be reduced by that amount.
Just my observations. Perhaps someone who has or is familiar with this machine will chime in.
Randy,
I may not be good....
But I am S L O W!!