Should I do a decoction?

I plan to brew Ed Wort's Kolsch:

7# 2 row Pils Malt
2.5 # Wheat Malt

Single infusion mash for 60 minutes at 151 degrees.

1 oz Perle 7.8% AA for 60 minutes
1/2 oz. Tettnanger 4.4% AA for 15 min.
1/2 oz. Tettnanger 4.4% AA for 5 mi.

I have never done a decoction, but think I should for this due to the pilsner malt. Would this be reccommended for the grain bill/style? Is there any better reads on the web I should reference on the how-to for the decoction?

Thanks.

I thnk kolsch typically has a more subdued maltiness, so that a decoction might not be appropriate. That said, if you want to do one, go for it. I found this site helpful:
http://www.strandbrewers.org/techinfo/decoct1.htm