I have both, and PS3 is a much better console overall.
Free online, better exclusives, the controller is far more precise for shooters, blu-ray, internet browser..
I could keep going.. Ive never had these "connection issues" with the PS.. I play online with Uncharted 2 SOCOM and Madden all the time with no problems
I have xbox basically because of GoW.. its collecting dust right now cuz im not paying for live, and any game on both systems ive tried was just as good or better for ps, especially shooters..