I myself use to have the former hd receiver 311 which had very limited HD channels and now have the VIP211 with alot more hd channels but i notice a litle diference in crispy images. compared to the 311 old receiver i thinkd the 311receiver had a crispier pic either that or the compressed signal to make more room for more hd made it degrading, or they made it on puirpous so the can sell more of this new turbo hd i think all this is all about sucking as much as they can from this new technology HD.botom line.
I think you mean 811. The 311 is an SD receiver.