I bought the E/B TKHS 315 and it is pretty heavy! About 10kg more than the Jet. You are right about the table thickness, it is heavy gauge steel.
I put a Freud blade on it, and it is a beast! Scared the s**t out of me when I first fired it up, I thought it was going to drive off!
The fence is rock solid as well.
I wouldn't like to put my hand on that blade when it's going round, I reckon that could give you a nasty cut, I do.
It has two folding handles at the front and you can lift it up and walk around with it (If your hard!)
I bought the sliding carriage for it, but have not tried it yet.
I cannot comment on what everyone calls a good cut on these dearer saws, but the cut on the E/B is as smooth as a babies bum and accurate too!
You do not have to undo any bolts to lower the rear table, although the locking mechanism is a bit crude. Apart from that it seems pretty well put together by todays standards.