Enjoy your new machine.. I looked and looked at the 6500 and 6600 even sewed on 6500 for a long time but the one thing I couldnt get past was the tension dial.. I felt like it was always in my face.. I dont know maybe it is just me. My mom gave me a Designer I and from what I can tell the features are very comparable to the 875 (except 875 has a bigger thoat space and is alot newer.. designer I has embroidery which I dont use) I LOVE the pressure foot up down .... Have fun with the machine.. I thought it was great and it would have been my first choice had I not sewn on the desinger 1.. Then I changed my mind and thought when I could afford a new machine I would go for the 7700 because the tension isnt in your face.. but now I am swaying more towards the 875 I think I will have to go sew on one at the store..
Have fun. I am sure you will love it.