I have these heads but am hearing that I will actually lose torque under 4k rpms. Is this true? I know I could run a smaller cam to make the same power but I am aiming for mostly low-mid range gains with any top end as a bonus.

I've actually been looking at aggressive truck cams. I'm not a revver and I dont like to beat the shit out of my engines, but I do like lots of power!

I considered an lsa blower but......I dont need that much to justify the cost.
Car is an ls2 CTS-v.