michaelmurfy: Welcome to Geekzone:
Since your new Bravia has more resolution etc, it's designed for HD input.
If your using a Sky Box with the standard yellow, white, red connectors you will receive a bit of a fuzzy image. This is normal. Your solution would be upgrading to MySky HDi.
Another thing you could try however is going into your Sky settings, changing the TV Type to 16:9 - This will get the Sky Box outputting to Widescreen therefore should give you a better image. Your TV will stretch the 4:3 to widescreen giving you a fuzzy image or a stretched look.
Hope this helps.
livnz: thanks - we just have the sky box connected via one main cable from sky - is that where we are failing?!?!
You can never have enough Volvos!
Or go with My Sky HDi and an HDMI connection (don't have to get the HD ticked, not worth it unless you watch lots of movies).