Backlash 2000 is probably the best PPV of that era but you've probably seen it already.
So I recommend Fully Loaded 2000. Real fun PPV that has a good mixture of light hearted fun and quality matches.
1999...is difficult. SummerSlam '99 is a bunch of fun with a well rounded card but if you want B shows go Backlash or No Mercy (Us edition).
ThunderAngel is on the ball.