Well, if you are not satisfied with google you can always use bing and yahoo. I do suggest you search for the same thing on each service to see the differences in your rankings.
One thing I did not see mentioned was the new google rollout on adwords and merchant center (google base feed). Google use to allow free submissions of products into the shopping segment, but now all of your product submissions must be linked to an adwords account by which google adwords can charge you. It steps directly on nextags formula.