I run a Mag Drive 24 on my 220Gal with all the lights I have and my temp is always 81 at most and 78 at least. I do have 2 Wal-Mart fans mounted in the back blowing on the water but still.
I can't argue your point, just tell you my set-up.
I did however get a brand new Hy-Drive 2100 replaced from the same company that replaced my Mag Drive 9.5. I got them Hy-Drive with my whole set-up and it died.
That pump was the one I said I could not tell it was on ever. I plugged it in with my head right above it and not a sound. I know there are a more reliable and bigger named pumps but this was the quietest I heave ever not heard.