I have to say that I don't have any official viewing cards for H/C channels, but if I ever do decide to get one I personally would go for SCT. It is said that this channel has been around a long time and if you pay your cash you can feel fairly safe that you'll get your 12months worth. If you have any way if pointing a dish at hotbird 13e even with a sky dish and digibox and go to add channels and put in 12.091H, fec.3/4 sr. 27/500, this will find 4 H/C channels (well 3 and a half). The channels found are S/view, S/viewPlus, SCT., and RCT which is clear and is the sister channel of SCT. This RCT channel might not show up when you do a transponder search, but if you see a channel called Italisat or something like that you have found RCT. As I said it's in clear and seems to be a 24h advertisement for SCT, but one add looks like very good value, it's called card mania and is for a very nice Samsong receiver with embedded Iredto2 or viaccess2 plus twin CI and a 12month SCT card for 599euro. There is talk that this has gone down to 499euro (a very, very nice price). The UK distributor is Media satellite UK not sure of their web address.
Hope this helps.