For those of you with high prestige who are competitive in SPM and KDR I encourage you to do it too. If you already have good stats disregard it, but...
I started the game out pretty bad (under 1 KD under 295 SPM) and by 10th prestige I had a 1.48 KDR and 330SPM and had 33k kills so by this point any good game I had didnt influence my stats at all and it started to make the game boring for me.
I'm at 2.21 KDR and 350SPM now since the reset and it started making the game challenging again. For those of you thinking about doing it, especially if you had a rough start, do it!
By the time I had 30K kills in Black Ops, my KD was probably around 1.60. By the time I finished playing Black Ops, my KD ended up at 1.74. One game won't change it much, but your KD will become more indicative of how you're playing.