I have the 830LE and the Bernina/Gracie frame. I have done one quilt so far and it was wonderful! I had used a Juki on a frame before, and the extra room with the 830 made such a big difference. The 830 is an awesome machine. That being said, if you love you 440 for piecing, and don't want to use it to trade up to an 830, then perhaps one of the starter long arms might be the way to go. The 830 does so much and I love machine embroidery, so it was the best fit for me. The frame is 120 inches and the quilt I did was about 100 x 110".
Oh, the Bernina frame is made by the Grace company. The Bernina site has video on loading the quilt on the frame. It was a big help for me.