Just completed an update to my 4 year old, Core 2 Duo based rig. It was already very quiet so my main goal was reduced power draw and increased performance. The ASRock board (with it's multitude of features and connectors) and the on-chip graphics allowed me to get rid of all my add-on cards. So far my Kill-A-Watt says idle draw is down from 78 watts to 35. At load, draw ia roughly 120 Watts, same as before. Temps are ranging from 30c at idle to 70 during Prime 95.
ASRock Z77 Extreme 4 LGA 1155
Core i7 3770
Zerotherm ZT-10D w/Scythe SY1225SL12M
Mushkin Enhanced Redline 2x 4GB DDR3 2133
Samsung 830 128GB SSD
Western Digital WD20EARX 2TB HDD
Integrated Intel HD Graphics 4000
I'm really happy with the Zerotherm cooler as I bought it new for $17. Performance is through the roof. The switch to the SSD being the most noticeable difference.