I love my Bernina 440 QE - the BSR is wonderful. I have a Grace quilting frame. As long as the quilt isn't big I tend to just use the BSR. If I get to Full or bigger I go to the frame.
I LOVE my Bernina but I'm considering buying a more affordable long arm - the area you can actually quilt (when you get the quilt rolled up etc.) is limited.
I wouldn't trade or get rid of my Bernina - the long arm would be in addition!
Good luck - the BSR is worth every penny.