Cheap stuff is absolutely fine, if you change it regular.
I change mine every 6 months, and I only buy the cheapest. Unless of course the posh stuff is cheaper.
The posher stuff is designed for longer change intervals, like 12-24 months or 20k miles.
I knew a lad once that insisted he loved his car more than I loved mine, as he'd put 96 squids worth of Gtx every 6nonths.... Haha poor guy (literally)