Is it possible to extend a Coaxial cable without loss/degredation of signal? - I need to have my sky ariel extended by about 2 metres so my digibox can sit under the TV. Also can anyone reccomend any good component switch boxes? my main concern is signal degredation. Would need it to be able to handle 720p & 1080i (Xbox360 etc) but dont want to spend a fortune. Any advice is appreciated as I am new to switches. I have jeard that powered ones are better. Thanks for any help.