I have a question regarding the options to replace my headlamps (2004 Discovery V8 4.6L). Both front headlamps are yellowed, fogged, and one has quite a bit of water sitting in it. I read about sanding it and sealing it, but am unsure about whether I should just replace them in total. If I go that route, are there any headlamp upgrades that I can try that will not eventually fog and yellow, or is that really the only option? A second question I have stemming from headlamps are actual bulb upgrades, what would you guys recommend? I have read LEDs work well, but just wondering. Thank you for any advice!