No no no no no no no no no no no no no and NO some more.
A halogen lamp assembly isn't designed to deal with the light an arc produces so you end up with scatter, all this does is look shit, blind oncoming traffic and, because its scattered and not directed, actually reduces your own visibility. There is a massive amount of hype on the internet but the simple fact is that it won't improve your vision at all and will quickly become annoying when you get constantly flashed by oncoming traffic because they can't see.
Plus they don't conform to legislation making them illegal.
Plus it should fail an MoT now.
Plus the kits aren't properly electrically screened and therefore will interfere/damage the rest of the cars electronics
Plus there is a very real risk of it melting your lens
Plus you invalidate your insurance - read up on that on the golf forum, a chap on there ended up disqualified for 12 months!
As for the seat covers, I can't help on that! Hopefully not put you off the forum, welcome by the way!