i'm not ttc yet dd2 is only 16 weeks 
i went through a hellish time ttc her and must of tested a million times over the 2.5years it took!
fwiw i only ever splashed out on branded tests after i had a + on a cheapie (mad? moi??) I usually stuck to the cheapy pound shop ones.
from what i have heard the blue dye one (clearblue) are crap for false +'s so probably a good thing you avoided those anyway.