Hi,
You can run armhf on any ARMv7a cpu as long as you have kernel source for it. http://boundarydevices.com/products/ lists two mx6quad boards.
Thank you for this inforamtion.Things I forgot, it's the amount of memory use by web browser when many tabs are open as I do and the problems from website using flash or java.
I thin I'll continue to use X86 for my workstation and when I'll upgrade my server hardware I'll loke to ARM motherboards again.
Thank you. Pascal.