if you book a place for NY by sncfvoyage.com a long time before the departure, the prices are cheaper...
i love London (i only went there 3 times, too short). I discover England when i was 15, since i never forgot this country and these towns : southampton, bath and of course LONDON.
what i like there, that's people and their mind. last time i went there, in June, i really felt at my place, it was like i always lived their ! wonderful and amazing feeling ! nobody looks at you badly, you can be dress as you want, at every hours of the day as the night, there's people in the street. They talk to you as they always know you...
for example, a night i was spending in Leicester, my french friends and i saw a girl with a very very very tiny skirt, crossing the street bare foot. nobody but us was looking at her.
Strange moment !
i especially remember the last night i spent there. you know, i met some people and we stayed at the hotel's pub until 4 or 5 o'clock of the morning. noone of us spoke the same language, they were spanish, bresilian, irish, greek and french... so, we all spoke in english, it was so funny !!!
i remember London as a great and funny place, where you can meet nice people !
i forgot to say, my brother went to new york on september, for a week. he really appreciated this place. but he never went to London, consequently he couldn't compare...