The Qbot was the computer that was bundled with my package. I'm pretty sure that all the 18X8 units came with it. The newer unit is called "Quilt Sew Clever", but it would do the same thing a the Qbot, so I'm not understanding your comment about adding a Qbot.
You need to get a list of exactly what's included, and the brand names.
If you go to the Viking web site, you will see that this unit is no longer listed. I got mine when they were closing out this model, which was Spring of 2011, I paid just slightly less that what you quoted.
Also, if it's a new unit, but old stock, make sure you get the warranty information in writing.
I paid extra for them to come out and set it up. It took 2 guys 3+ hours. The machine is very heavy, over 70 pounds and I just didn't want to deal with it. After watching them, I was glad I paid the intstall fee. Also, they made sure that everything was working, qbot, stitch regulator etc. before they left.