I like getting the U2 vinyl LPs to have the band sign. Most recently I had The Edge sign my Achtung Baby LP, the cover of which is way too busy on a small cd, to put 4 signatures (5-6 if you add Lanois and Eno)on it and still look good.
As for the reason why the vinyl will sound better, provided you can overlook the surface noise and clicks, is that the frequency range is wider than what is possible on cd. It picks up more of the high and the low frequencies than does the digital reproduction of the music.
The question no one has ever answered for me is that if an album was recorded digitally, shouldn't it sound exactly the same on cd than it would on vinyl, as the very high and very low frequncies would not have been caught in the recording process?