I am thinking exactly like you are. I figure a cam will wake it up, and that the LS6 heads are decent as is. Did you read the article in Hot Rod an issure or so ago? They took an LS2 crate motor and did some cam swaps. I have read it 5 times and still can't quite figure out what some of the dyno pulls included (as they also had some ported heads, 1.8 RR and LS6 instake.) But what I was able to gleam was that even the GM Z06 cam from '02 gave the LS2 engine a kick in the rear. I think they were making mid 400s with the cam. They did all there testing with a stock (LS1 I think) computer, no tune. They also confirmed that reducing back pressure generated postive results.
If you already read the article, I am sorry to add no new info. My plan is to wait until I hear that LS2 edit (or another) is out and reasonably stable, and then do a cam, tune, and headers. I really like the stock exhaust sound. Just not sure whether to keep the cats. No worries in FL about emissions, high flow cats are kinda pricey.
Has anyone done a cam swap yet on the LS2? I imagine we might find out more on the vette sights, but our cars are heavier. Engines might be the same, but the application is different, I think, ya think?