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It mostly depends on riders priority of getting better tire mileage or a more comfortable ride. If you keep 30 to 38 p.s.i. in your tires, be prepared to replace the tire more often.
I ride solo. My '09 rides well enough that keeping 40/41 p.s.i. in both tires is a fairly comfortable ride. Riders of other models may not be able to do the same.