Personally I won't buy another Singer. They just don't seem to be as good as they once were and the service is worse. Go to several dealers of different machines and try them out. Decide exactly what you want on your machine--needle down option, feed dog lowering, thread cutting, decorative stitches, blanket stitch, etc., and then buy one with as many more options as you can afford. Trust me, you'll end up using them and be happier with your machine much longer. Also, if you purchase a reputable machine from a reputable dealer that also services them you'll save yourself a lot of headaches in the long haul. My next machine will be a Janome.
ps. Also check out the price and availability of the accessories such as additional feet.
Hope this helps.