The Piaa silicone blades are hands down, absolutely the best.
I have had them on all my cars for years. They are so good, you can clean your windshield without spraying water.
They were one of the first things I added to my SMB when I first got it. Also, you can run a bigger size than the stock size is. I believe stock is 20". I changed my Driver side to 22", and the passenger to 21". I think you could run 22" on both sides though. I only went 22 & 21 because that's what the replacement size was on my Tacoma, and I had them lying around.
I bought kinewave's van and have inherited the piaa silicone wiper blades on the van. They do have a shelf life and they are now streaking and not clearing all the water. I too am thinking of replacing the piaa blades and may try something else?
I've only had the PIAA silicone wipers on the van for a few months, but on my recent 2,000+ mile trip, they were fantastic. Absolutely quiet, and no streaks. Had plenty of rain and snow to deal with, and they didn't miss a beat.
SMB-less as of 02/04/2012. Our savings account is richer, but our adventures are poorer.