Hi Sarah
I like Fake Bake and St Tropez mousse, if you haven't used them before I'd say go for St Tropez as I agree with Sam, you don't usually get streaks.
Make sure you exfoliate and moisturise really well before you put the tan on and I'd say wear gloves - even marigolds will do to save your hands from getting too stained, then when you're ready to do your hands either put it on cotton wool and smear over or else put it on the back of one hand and rub in using the back of your other hand.
HTH
Lucy