Mick thanks for your help on this.
Spoke to a mate (also a Spurs fan so I trust him
) who works for a company that deals will plasma tvs, projectors, etc so he's pretty versed too. It was a brief discussion and I think he's also leaning towards the RG6 75Ohm. I've reduced the length I'm after to 10m as I think I was trying to be generous (just planned it better). I couldn't see the frequency or the impedence you mentioned on the Superhub however.
I'm going for gold plated connectors as you said, these are important (I assume gold plated is better?).
I was looking for flooding/flooded type cabling as part will be external though difficult to find.
I did try to find RG60 but no luck.
Oh by the way; it seems a lot of retailers claim RG6 but then go onto say it's RG59 - the latter I've been warned off against. Bit confused there.
Cheers