I say it depends on what you want.. I was shopping at Target the other day and was strolling by their sewing machines. They had a Brother XL3750 and it was on sale for $99. On further checking it had a "quilting package" with it.
Walking foot, 1/4" foot, quilting foot, quilting guide, and wide "deck" you can add to it.. so far I love it.. and you sure can't beat that price.. it even has a self threader for the needle.