Welcome from Ontario, Canada. If your old machine is going to cost as much to fix as it's worth, then you are probably better off buying something new. You can do a lot of straight line quilting without lowering your feed dogs for free motion quilting. As to what machine will suit you, try a lot of different brands to see what you like. Bring a list of features you want with you and see what you can get in your price range. I am not familiar with Janome or baby lock machines so I can't offer an opinion.