Shopping for a Sewing Machine

As those of you who read my blogs would know, I rather sadly lost both of my grandmothers recently. One in December, and the other in early February. They were both wonderful women who unbeknownst to me, left me a small amount of money. I have decided to use the money to buy a new sewing machine. So, keeping in mind I have around between three and four thousand to spend, what do you recommend?

I currently have a Pfaff which I love. I am pretty brand loyal, but can be swayed. It will be used for piecing and quilting. Below is a list of things I know I want. What else would you suggest?

I want:
Automatic needle down
knee life on the needle
some pretty quilting stitches
a larger space to fit bigger quilts
an extension table

So, what are your suggestions??