With 2nd Gen Intel Core CPU's (Sandy Bridge) that use Z68 widely in use now, and 3rd Gen Intel CPU's (Ivy Bridge) that use Z77 on the horizon, why are you looking at such an old platform?
The H55 chipset was introduced for Clarkdale (1st gen Intel Core CPU's), but I imagine it would be hard to hear anyone recommending it with the next gen chipsets available now.