Can anyone recommend a good inline pump above 3500gpm?

I'm looking for a pump over 3500gph what are some good brands and places to buy, maybe local? Thanks ahead of time!

......not gpm but gph sorry

I use a hozelock sump pump if I need to move large amounts of water or need decent pressure. not sure of GPH and about £50 here in UK. 1.1 bar or 16 psi.

http://www.ebay.co.uk/itm/Hozelock-3-In-1-Water-Butt-Pump-/400499669393?pt=UK_Home_Garden_GardenEquipment_HandTools_SM&hash=item5d3fa3f991

i use a pump of awan because it gives us very good pressure. i am using this pump from 6 or 7 months. and it is giving me very good results. You can also search it from internet and also buy online. So please use google for search this pump and use olx.com for buy it. Thanx.