Try the Brother PQ1500s. I have had mine for years and never had to have anything done to it. It is a straight stitch machine only, but it is strong and fast. It is all you will ever need for quilting. My favorite features are the needle up-down and the auto cutter. The cost is $500-$700 most anywhere. I have other more expensive machines, but this is the one I use all the time. Just keep it oiled and change needles every project. Simple to use.