I have 3 Berninas -- a 440QE, a 240 and an embroidery/sewing machine whose number I don't remember right now. I also have 9 Singers, 6 of which are Featherweights. I had a Bernette, which was my go-to-class machine, but I gave it to my son when he got married (he sews, DDIL doesn't). The Bernette was an eBay purchase, but from the start was dependable and easy to use, and I would and have recommended them to friends. My advice is to (1) decide on what you want to pay; (2) visit several dealers and sew at the machines; (3) take your time. If you know that you are going to be using it a lot, then it would be worth it to spend a little more money. The more money you spend, the more bells and whistles you get, so decide what is important to you -- knee lift, needle up/down, built-in decorative stitches. When you buy from a dealer, you have the guarantee of service and advice.
Also, White machines are made by Husqvarrna; Kenmores are made by Janome; Bernettes are made by Bernina.