Any video display will benefit from an external scalier, the unfortunate truth is display manufactures will use a lesser scalier to cut costs. The DVDO is a good entry level scalier; the Faroudja dvp 1080 is the better scalier but your going to pay for it.
DVDO has a new scalier coming out buy the end of this year, that will replace the iScan HD+. I don’t know much about it yet other then it will have HDMI inputs and one output. DVDO should unveil it at CEDIA.
This is because Meridian have just announced a major commercial tie-up with Farouja (I think that reading between the lines Meridian have bought Faroudja), so expect some seriously good kit from the new range in the next year or so!
What i like about the DVDO is it has more inputs then the Faroudja. For that kind of cash they whant for the Faroudja, throw some extra inputs it wont kill you. People have more than one DVD player or HD source.