Avengers was insanely awesome. Probably my favorite super-hero flick besides Nolan's Dark Knight trilogy.
As for Star Wars vs. LOTR, they're such different types of movies its tough to compare. I will say I thoroughly enjoyed the LOTR movies. But Star Wars is classic, and the characters are iconic.
I'm going to throw a curveball here though:
Darth Maul > Darth Vadar
Keeping GMB punk rock since 2009
http://starwars.wikia.com/wiki/Yuuzhan_Vong <-- They need to bring these guys into the movies. The whole Jedi vs. Sith thing is getting stale.
Cool story bro