I've liked any Goodyear tyres I've had. They always seem to offer good grip and more importantly feel progressive and predictable.Just got the car so I need to get used to how it feels but the Goodyear seem to have crazy grip.
I agree that tyre pressures make a big difference but I disagree about the difference between the beam and independent rear suspension. I've had both (Leon and Golf) and also had the two systems on two other very similar cars (Nissan Primeras). They feel different, I prefer the independent systems, but in terms of actual grip I don't think there is much in it. It's worth remembering that on a beam axle both back wheels stay parallel to the ground at all times and there have been a lot of brilliant handling cars which featured a solid rear axle. Mk 1 and 2 Ford Escort for example.
I'd rather have the independent set up as it's much more playful and engaging but the beam gets the job done just fine.