The tyre I bought was an Avon Venom X, not a cheap unknown brand but one that was recommended for the bike I have had it put on.Still had to get Slipstream to put it on when I had a full service, but still saved a good few quid.
I would never put anything on that was sub standard or cheap,, tyres I think should be the best for the job. irespective of how much they cost.