Hardware Zone pits the Barcelona against the Clovertown and Harpertown. BCCHardware reviews the Ultra HDD Cooler. Here is a very nice motherboard, InsideHW reviews the Asus P5E3 Deluxe WiFi-AP.
This motherboard definitely merits a reward in its own terms, but we simply have to omit one. Even if this board manages not to be too expensive, it is plain rabid to give 400€ for 2 gigs of DDR3 RAM. However, if you want the best of the best without caring much about the price, we recommend this board wholeheartedly.