With a longarm and no need to embroidery, you might wish to consider the 430 instead of the 440. It has just a few less stitches, no BSR and no embroidery module included, for a lot less.
Otherwise it's the same machine. I can't speak for the Janome, but the 430/440 is a wonderful machine! While I agree dual feed is very nice, reducing your presser foot pressure on the Berninas to abou 35 will give you perfect results.