What i'm doing is having a sky hd and sky+ multiroom install for the moment so that i dont have to pay install fee of £60 (just bought tv for over £169) so that in the future i can buy a sky hd box for a rather cheaper price (hopefully) and then simply swap over with sky+ box.
Of course i will have to pay an extra £10 HD sub
(hopefully by then sky HD subs would be free)
I would much prefer to just have a simple HD box without any Sky+ functionality though