I can only speak to my sliders - Slee sliders - but I can tell you that they have taken the weight of my fully loaded 200 many times, without bending.
Mine are slightly dented in places, scratched like a mother, but they do their job exceptionally well.
Plus, Slee is a small company that really supports our 200 Series group - I personally think that should factor into sending some money their way for sliders, in addition to them making an outstanding product.
Full agreement on last point. A good guy who started a good company. Honest, and won't try to talk you into unnecessary stuff. If anything, @sleeoffroad tends to talk people OUT of stuff unless truly needed... Go figure!! Reverse psychology?