Thank you for the tips, guys.
I successfully replaced the sidelights with the Osram ones I bought, and it took me less than 5 minutes even though that was my very first time and at night in the dark! It's probably the easiest bulb to replace in the whole car.
Anyway, I cannot say I'm happy with the result, but at least satisfied since it definitely is much brighter than the standard yellow sidelights that come with the car, however not even close in terms of brightness to my 6000K HIDs, but that's expected from a standard halogen (4000K) sidelight bulb. The best thing is that it doesn't give any errors, mainly because it's halogen, of course.
This is the result:
[imghttp://img833.imageshack.us/img833/8292/img2012080500041.jpg[/img]
As you can see, it's brighter than the standard yellow sidelights.
This is what they look like with nothing else on. They actually look very decent, in my opinion.
You cannot really see it here, but if you look closely you'll notice that it's darker, or at least much more yellow, than the HIDs.
And this is the last picture, which shows that it's yellowish when you look at it side-by-side with the HIDs, however if you turn off the HIDs, they'll look bright.
By the way, the Philips Blue Vision are almost the same, if not a bit yellower, than these ones as the Osrams are 4000K while the other ones are 3800K, if I remember correctly.
So I guess the only thing that'll be remotely close to the HIDs are LED sidelights, but they will give errors and such and I honestly don't want to go through that hassle.
What do you guys think?