I got bt infinity just before xmas , after noticing my monthly charge was going up by a pound to £22.50 for option 2 , and the advertised charge for bt option 2 with infinity was £18 . So faster speed (37MB) for less money for the same 40gb download limit , no brainer really. So phoned bt and i ended up getting it for £16 a month ,and as you say you dont really want to leave bt ,as i have been very satisfied with their service . I should go for it.