I am with freedom2surf and am just about to move to A&A. f2s have been ok - it's £19.99/month for 20Gb (unmetered 1-6am), and I barely do 5Gb of the 20 anyway. The annoying thing is that on the odd occasion I want to use BitTorrent or some fast HTTP downloads their traffic shaping seems to keep the speeds much lower than my 8 meg line speed.
I got my MAC today but my billing cycle is the 17th and on the phone they said it would be five working days so I will arrange it for this time next month.
I should add that I am always out during the day, so 1Gb will be fine, even over the christmas break I think.