So many to choose from. I have most of the good sounds on my PC, and my site (shameless plug: http://www.popmanifesto.com )
Here's goes:
1) "Well look, I've got some cool pogs........Alf pogs! Remember Alf? He's back, in pog form!" --Milhouse
2) Homer: "There, There, shut up boy. We'll just get you a new dog.
Bart: "I don't want a new dog, I want Santa's little helper!!"
Homer: "Well, crying isn't going to bring him back, unless your tears smell like dog food. So you can either sit here crying, and eating can after can of dog food before your tears smell enough like dog food to make your dog come back, or you can go out there and find your dog!!"
Bart: "You're right.....I'll do it!"
Homer: "Rats, I almost had him eating dog food!!"
3) "Hi......ah......let me have one of those porno magazines, large box of condoms, bottle of old Harper, couple of those panty shields, *and some illegal fireworks*, and one of those disposable enemas.....ahh, make that two!" --Homer
So many to choose from.........