anybody who takes any of their hardware beyond manufacturer specifications will at least think about venturing into alternative cooling options.

many actually make it a point to take a lower end or mid range part and run it at it's maximum capacity.

i often feel that extreme hardware does not always justify it's extreme price.
for example:
an intel i7 860 or i7 920 performs well for a mainstream platform and i7 975 will not double in performance but it's price is 4 times higher.

comparing the chipsets P55 and X58, there is still a good $100 dollar difference on average with actual performance differences fairly minimal. the only thing the X58 really outshines the P55 is in SLI/CF applications.
also, the X58 has been out a bit longer and prices have dropped.

if one decides to remain on a single video card, there is really no point of shelling out the extra money for the board and it would be better invested in other hardware upgrades including alternative cooling.