On Olevia's website you can compare models like this:
http://www.olevia.com/jsp/products/c...27v&pidTo=527V
They all appear to be the same, except the 227 and 527 are black, whereas the 427 is silver.
The other model you listed is an older model, so it is lacking some modern features, DVI input instead of HDMI, etc.
If you don't need a tuner you might save some money buy getting the Olevia 327v, similar in other respects to the ones you listed, but without a built-in tuner.
http://www.olevia.com/jsp/products/c...27v&pidTo=527V
They all appear to be the same, except the 227 and 527 are black, whereas the 427 is silver.
The other model you listed is an older model, so it is lacking some modern features, DVI input instead of HDMI, etc.
If you don't need a tuner you might save some money buy getting the Olevia 327v, similar in other respects to the ones you listed, but without a built-in tuner.