unfortunately good reliability, and good speed don't go in hand with cheep
as the saying goes, you get what you pay for.
I would reccomend a Corsair Flash Voyager, i have one - it is mighty quick, i have stepped on it and even road over it on my bike (long story) and it's still going strong - but it's definitely not the cheepest out there.
Just type in Corsair Flash Voyager im sure you will find many suppliers online.