Which ARM board for a private webserver?

Hi,

I'm looking for an ARM board suitable for running apache and mysql (plus x later on). It should be as cheap and power-saving as possible. Can you provide any information about the different ARM cores?

Raspberry is running an A11, most other boards run A8 and some have A9.

This is what I got so far:
Raspberry: cheap, power-saver (3.5W), but may be to slow for apache, mysql
Cubieboard: sold out atmo, nice price, but no information about power consumption
Hackberry: slightly faster than cubieboard, and therefore more expansive, power consumption?
A13-OLINUXINO: one league with cubie and hack
CuBox: to expansive for me
Odroid-U: sounds quite cool (Samsung 4 core A9 like in S3), but unavailable at the moment and seems to have some assembly issues, power consumption max 10W (2A*5V power supply), avg should be less

Do you know any other boards that fit my needs? Do I need the A9 or is mysql and apache not multi-core-optimized so a A8 could be better? Can you say anything about power consumption of the listed boards? Can I run those boards without an attached display/keyboard/mouse?

Thanks a lot!