I don't have a food processor, but do have a suggestion. For any major purchase (defined in my case as anything costing more than $20), I check amazon.com and read the customer reviews there. You get a good cross section of comments and evaluations on all of the products available; basically, they answer all of the questions you pose in your second paragraph. I have also found great suggestions from commenters regarding use of the products.
One caution though: amazon doesn't always have the best prices. Once you decide on a particular item, search the web for it. Good chance it will be available elsewhere for less.
Live your life and love your life. It's the only one you get.