Good points, in other situations was also just trying to see if I can get better temps. Helps with cooling issues overall. If not the overclocking situation. That would have been a nice to have. But focusing on cooler systems has its uses. Means less overall effort to keep them cool small but can be significant powersavings as alternative means to cooling can be applied.
If you want better temps, wack a more powerful fan over it. Convective heat transfer scales with air speed as a root, ie 2x your airflow and you get root(2)x more heat transfer [assuming constant air temp].
The difference between fan models are pretty much $1 wholesale, so its far more efficient to put on a stronger fan than spend $10 on a larger, heavy heatsink.