Well....Bernina offers a 20 year mechanical Guarantee. Your most efficient purchase would be a 440 (discontinued) a 640 (Discontinued) or the new 5 series. The 440 offers the stitch regulator and has embroidery capability ( must use laptop ) The 640 offers a wider stitch plate (9mm) and allows embroidery as a stand alone unit. The 5 series is more specialized. Any of these choices would offer you the most flexibility and growth with the safety net of a long warranty. Good Luck!