How good is the Technics 1200 Mk2 with all the KAb upgrades?

I have an MkII with the Kabusa upgrades described above, I use it with a Paradox Pulse 103R (requires additional extended weight for tonearm). For my 2 c, for the money it's an excellent TT. I use it primarily for playing 45 rpm vinyl and any vinyl that may be dished or slightly warped. The clamp is a Michell.  For reference my main deck is a MS RX5000. 
In your situation, given it's new and a sunk cost....it's a great find and I would put to straight to use! :)

fluffers.. I find it difficult to type that !!!LOL

See my previous post, there is a lot of money in those upgrades, it's good to go, believe me. There becomes a point of diminishing returns, you could change the tonearm etc, but to be honest, I would not. Make sure the TT is isolated, make sure the records are clean and enjoy. 

Conversely, listen to the naysayers, keep it in the box , ping me...and i'll take off your hands! LOL