I have some fabulously expensive Cat 6 STP (35p/metre) but to use it with LAN jacks not designed for shielded 8P8Cs is a pain.
Plain old boxed Cat5e is about 16p/metre for reference.

Mark
G68, baby Genelecs, Humax Foxsat, Oppo+Vanity93, Toshiba HD-A35, Pioneer CLD-925 + Meridian 519, various other random bits and bobs
Got a black G08.2 you want to sell?