Oh how I love weezer. One of my fav bands. Just saw them in concert 2 weeks ago. Anyway, do like everyone else has said, the Blue album is perfect and the Pinkerton album sounds weird or different to some people (it is but I LOVE it) and you should pick up that as well.
That said here is my list of what you should downloa... err I mean listen to
Blue
-Holiday
-In the Garage
-My Name is Jonas
-Only In Dreams (kickass song to go to sleep to)
-Say it ain't so
-Surf Wax America
-Undone
Pink
-Across The Sea (one of my personal favs)
-El Scorcho
-Tired of Sex
-Why Bother
Green
-Don't Let Go
-Hash Pipe
-Island in the Sun
-Simple Pages
-Photograph
Maladroit
-American Gigolo
-Burndt Jamb
-Dope Nose
-Keep Fishin'
-Slave
-Slob
-Love Explosion
and one that most people don't know about that rocks is Velouria
you can also go to their website
weezer.com and download some new stuff that they may put on the next album
WEEZER FREAKIN ROCKS =\/\/=