Merry Christmas!!! 
I am so happy for you that it arrived in good time, and all in good order.
Here's to many happy hours of sewing with your 6600.
As for the weight ... that is one of the things that make the 6600 such a great machine. If you have the space, you may want to get a desk/table, so you can leave it permanently set up ... and allow for sewing, whenever you have just a few minutes.