Do you mean you need needle up/down? Where the machine stops with the needle in the fabric? There is also an attachment you can get that allows you to raise and lower the presser foot with your knee.
Many machines come with needle up/down now. Janome is a good brand. You might also want to check out Sears Kenmore machines, as my understanding is that they are made by Janome but cost less for equivalent features.
A key question is your price range. If you post your price range, you may get more specific recommendations with brand and model number.