I just bought my new Ram about two months ago, traded in a Ford Ranger. In my Ranger I had the Silverstar lights and they are really bright. I will be buying the Silverstars for my Ram as they are excellant lights.
have the zxe's in my headlights, they are pretty white, you really see how yellow the fogs are compared to the zxe's its pretty unreal, as far as being brighter, dont get your hopes up for anything fantastic, there isnt much of a difference from what I can see. I hear PIAA has the brightest halogen
I ran PIAA's before I went the HID route and have to say they are fantastic. I've run silverstars and they don't even come close to the PIAA's. They are pricey but so worth it! I was so impressed with them I even put a set in the wifes Chevy!