In most cases you get what you pay for, I went the cheap way on a previous set of tracks and i will never do it again.
I recommend to everyone I can McClaren Next Gen TDF. They are priced the same as factory tracks (on my takeuchi anyway) but performance is way better. Less vibration and more traction.
I cant tell you just yet how many hours they will last but they are already about to double the hours of the cheap tracks. And I am so Impressed by them that any new machine I buy will have them installed before leaving the dealers lot and they can have the factory tracks back back.