Had a quick look at Costco Goodyear AS vs Toyo's on Black circles (which I'd get over the more expensive options) - after adding in the fitting fee plus ~£35 a year membership (which I'd probably not use separately), I'd be saving about £25 in total - but would have to drive a 50 mile round trip to get them fitted - whereas black circles I can get fitted 5 mins away. So works out pretty much the same... I suppose with the Goodyear at Costco I have a slightly better tyre for that price, but it doesn't make a huge difference for the type of driving I'm doing.