Well I personally care bout the Idle temp cuz I like my system to be cool when its not doing any thing sitting there being pretty and noisy thanks to the PSU
(even tho now I'm planing to add more fans which probably going to add more noise to then case)
Also its logic if your idle is low your load will also be lower, I red on forums cool temps such as 60-65 under load where as mine pushes as high as 70-80 at times hence it does worry me if I might have done some thing wrong or that there is some thing I can do to enhance the performance.