How much are you going to use them?
First off, I'd say don't spend 100+ on an individual knife unless you're going to look after it.
I do a good bit of cooking. Not as much as I'd like, but enough that I'd get annoyed with bad knives. I've a few expensive ones hidden in a drawer somewhere that I bought in a moment of madness, but my go-to knives are in a wooden block on the counter. It's a set of 5 knives from Richardson Sheffield. I've had them at least 10 years, and they're used daily. I think they might have originally been bought by collecting tokens with grocery shopping.
There's absolutely nothing wrong with the right knives in Argos, but go somewhere you can see the knives, and feel the shape and weight in your hands. For example I can't use some of the knives that my wife prefers because my hands are too big. And she hates my chef knife because it's too heavy.
And make sure you learn how to sharpen a knife properly if buying anything decent. It's very easy to ruin a good knife.