I had my MBP delivered only a week ago I have neither yellow tint or uneven illumination. You could follow the histeria of believing every 17" or glossy or whatever screen has issues with them, this is not the case, if you see the thread about "MPB is perfect!!!!" you will see the positive posts about MPB and the screen. Just because this forum is saturated with people starting threads about their issues with screens dosnt mean they are all affected. I think tighter moderation is required to ensure things like this dont happen.
From reading recent threads you would believed that macs were plagued with issues left right and centre and no one would end up buying one.
You say "common uneven screen issues", its only common on this forum topic, it dosnt mean its common throughout the whole of the MPB owners throughout the world, it it was a real common fault, im sure apple would have something to say or a recall if it really was an issue at all.
I dont have a single issue with mine, no warping, no screen issues, no battery issues.
As someone has already stated the only difference in the LED gives you is no mercury, slightly better battery and very slightly brighter, but tbh I cant have my CCFL 17 gloss over 3/4 brightness, its way too bright. I really dont seen the need to have or wait out on LED just because its "newer". New is not neccesarily better, it may be cheaper or in this case more enviromentally friendly.