1.2x01 "Summer Kind of Wonderful"
2.2x14 "In the Realm of the Basses"
3.2x03 "The Dark Night"
4.2x13 "O Brother Where Bart Thou"
5.2x12 "It's a Wonderful Lie"
6.2x02 "Never Been Marcused"
7.2x21 "Seder Anything"
8.2x24 "Valley Girls"
9.2x08 "Pret-a-Poor J"
10.2x25 "The Goodbye Gossip Girl"
11.2x07 "Chuck in Real Life"
12.2x20 "Remains of the J"
13.2x16 "You've Got Yale!"
14.2x15 "Gone with the Will"
15.2x19 "The Grandfather"
16.2x04 "The Ex-Files"
17.2x11 "The Magnificent Archibalds"
18.2x09 "There Might Be Blood"
19.2x18 "The Age of Dissonance"
20.2x17 "Carnal Knowledge"
21.2x23 "Wrath of Con"

This is pretty accurate to my list, but not quite. My top five are:

1. Summer Kind of Wonderful
2. It's a Wonderful Lie
3. The Dark Night
4. In the Realm of the Basses
5. Never Been Marcused

Actually it's super close to my list, which is;

1. Summer Kind of Wonderful
2. In the Realm of the Basses
3. The Dark Night
4. O Brother Where Bart Thou
5. Valley Girls

It's pretty close but not exact.