Tried them and i couldnt see a difference. Checked out the signal test in the system setup and the signal stength and quality are the same as before. I currently have the cheaper one installed. It came with all the fixings whereas the £60 one didnt.
Cant seem to get ITV HD though but i've got BBC 1 HD at it looks great. Hoping there are going to be some more, decent HD channels on freesat.....soon. Toying with the idea of getting SKY HD but only if they come up with some amazing offer!
i know there has been problems with certain stb recieving itv hd, on some stb you have to manally enter the polarity and frequencies to recieve it, if you google your reciever make and model and look for itv hd settings you find the info you need. also try this link, normally a good source for satellite info http://www.bigdishsat.com/news.php, also if u need the fittings to make the lnb fit your sky dish see here http://www.dastv.co.uk/LNB_Holders_Brackets.php