Rob - you havent changed your wiper blades in 2 years?!!! You know its "recomended" that you change them every 6 months, right (yeah, they can last for longer than that but 2yrs?!)? As for what others use, I always buy Bosch wiper blades at Pep Boys. They range anywhere from $10-$20 a piece and pop right into place. I've tried the rain-x before and agree its nice for highway driving, but I think it does more harm than good if all you do is city driving. I havent had it during the winter though so I dont know how much it would help there.
One last thing, has anyone seen the new "hot shot" feature, or whatever its called, on the new caddy's? Supposedly if you push a certain button, it will warm up some washer fluid before squirting it on the windshield. Anyone know if that can be retrofitted to the older cars?