A bit late but... the Lutron Dual Rania dimmer would do the job perfectly - it has support for 5 programmable scenes and 4 presets per zone. Unfortunately the standard Rania remotes don't support the Scene or Preset functionality (not enough buttons - although the Single Rania Remote does support the "Favourite Scene" function via the round silver button). The Rania is largely compatible with the Grafik system, so you may be able to buy a Grafik remote (although I'm not really sure if this would work) or program your Harmony remote with the necessary codes (which definitely does work) and gain access to the Scene/Preset functionality.
I'm currently having Logitech add all of the Pronto codes for the Rania range that I obtained from Lutron. They've currently added the codes to my Logitech Harmony One account and they're working perfectly... I'm now waiting on Logitech to create the correct Single and Dual devices for everyone else to use.
Lutron Rania Pronto codes in
this post.