Openbox F3 has 1080p which mean Full HD. Openbox M3 has 1080i which mean HD.  Dreambox 800HD SE has 1080i which mean HD. Customization Dreambox 800HD SE has more compare to Openbox.  Basically Openbox is a simple interface but Dreambox 800HD SE has a more feature interface. Boot up time Openbox is faster around 30 seconds or more. Boot up time Dreambox 800HD SE is around 1.2 minute or more. Openbox M3 or F3 is much smaller than Dreambox 800HD SE. Dreambox 800HD SE has built in wifi but not for Openbox. Need to buy skybox USB wifi. Cost RM1$$. Picture quality not really sure...Hmmm..... Hope this explain a bit more. 
Not sure Openbox and Skybox is related or not but both is the same? 

No mislead laaa.... from the device to TV is 1080p for F3 only. I didn't say satellite...  ....M2 only HD...1080i 
Forum is to discuss...anything wrong you can guide back the topic...nobody is perfect....
Anyway, I'm off to hunt for decoder... even though is a bit headache to do researching day and night between openbox, skybox, i-box and dreambox..There is a lot of box out there...    Thanks to this forum to narrow down the choice.... 
Ohhh...forgot..one last thing to share...they even have satellite booster for sale....    Attach is the photo.

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Added on June 1, 2012, 2:32 pm

Still haven't give me best price...lol? PM