i've got the silvers for both my highs and lows. i thin the extra brightness that silverstars pump out get canceled with the blue tint, so u get no real increase in output it seems. color's nice an white though. i think if u want brighter, u should look for the euro silverstars.
I have the Sylvania Silverstars in my Subaru and had the Osram Silverstars in the SUV b-4 i converted it to HID. The Osram is brighter but has no blue tint, hence a (warmer) yellow color. They appreciably brighter then the Sylvania Silverstars (blue) but if you want color the Sylvanias are better then stock Halogens. SUVLIGHTS.COM has both..