What is the best rc helicopter i can get for quite cheap?

I want to get myself a huge rc helicoper! i have looked on the internet for about 3 and a half hours now and i think i want an electric one, i initiallly wantes to spend about £100 but now i have seen what more money can get me i think i will stretch my budget. i want to be able to take it to the park and fly it for at least half an hour, but im not sure that the electric ones will last for that long, i want it to have a very long range and last, as i said for at least half an hour but preferably an hour, does anyone know of a model that does this and is a big one, i want a big one!!

thanks for your help
sorry iv not written that very clearly

I want an rc helicopter that is big (preferably huge) lasts for at least half an hour to an hour and has a very long range
it doesnt have to be electric i just want to know what it needs to run on and about how much am i going to spend

I think that the bis one is great. Most of the rc electric helicopters not have very long range, i think it's about 15 minutes, and i think if you want at least 1 hour, it should be need more batteries. Thank you, hope it help

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