Thanks all,
Yeh tonight i've found out it's far too expensive to stay in Manhattan, so looking at the other islands, this one seemed the best deal i could find. £71 per night is very cheap, and it's a 4*, and is only 10mins from Manhattan. Only down side is the poor reviews from the guests, saying its very loud (as there's a night club on the top floor!).
http://www.ravelhotel.com/default.aspx?pg=gallery
Flights - i'll check eBookers, thanks Maccaman.
Oh, and since i grew up watching Home Alone, i've always wanted to stay in The Plaza hotel, just for a night to say i've done it... but for 1 night the cheapest room i could find was £662, so i'll be giving that a miss