Wolf blass Yellow Label is my favourite(affordable) wine by some distance. Please don't confuse this with the Wolfblass Eaglehawk, which is very respectable - this is a class above and normally around £9 a bottle - genuinely. It gets reduced every now and then to about £6. 3 for £15 is like 3 for 2 on a GREAT wine.
It's a blinding wine...try and ye shall see.