Personally I would live with the squeal unless it was causing fork judder. I had a problem with squealing and judder on my cross bike; CR720s
solved both problems instantly and permanently. Best £40 I ever spent.
We're still very much at the novice stage with our tandem, but we also just use cantis front and rear, so far so good. Oh, we are also 270lbs so I'd be interested to see what others think.