The silver stars are good bulbs. I stopped using them due to the higher current draw and they give off a lot heat which can melt some light housing.
Check out the discussion on silver stars here:
http://saacforum.com/index.php?topic=5435.0
All though expensive, I favor LEDs for there lower current draw (lower than the stock H9 bulbs) and light output.
I believe a stock H9 uses 50W where as you can get LED replacements in 25, 35 and 45W. I believe 25W LEDs put off more light than a standerd H9!