I've used the arm, which is a good sounding, easy to use medium mass arm which, depending on headshell, can be used with many excellent cartridges.
I don't have experience of any of the complete tables (I think), but it seems to me that the Kenwood is relatively simple electronically and the Denon and the Sony are more complex (and those Sony fluid filled feet are not long term stable), which means that, while they may offer more now, they may become headaches later. (I had a similar (or the same?) Denon for a short while, and it was divine, but I was always uneasy about everything going poof, so I moved it on. But it really was fine sounding.)
I tend to like simple devices, so the Kenwood would be my choice, but tastes differ.