I want to start a new web project and need some recommendations according the frameworks. The aim is a controllers user interface, so a kind of Human-Machine-Interface (HMI).

I'm using EmDebian Squeeze with Apache, PHP and (if needed) MySQL on an embedded environment (ARM with 400MHz and 64MB RAM). The following are some requirements:
- fast access even on this slow backend
- support of a wide set of browsers (MS IE >=6, Firefox, Safari Mobile)
- user groups with different access
- live update of some values (with manual refresh, some kind of push)
- wizard driven installation routines to add new hardware/functions
- similar look&feel on PC, netbook, mobile with different screen resolution
- unit test support
- undo and redo functionality
- l10n and i18n
- dynamically load extensions (call it modules, applications or plug-ins)

But what is the technology able to implement this with lowest effort? I thought on:
- Joomla
- Symfony
- Lithium
- CakePHP
- Joomla + CakePHP
- or some other combination

Any idea?!?!?!?