Overall if you're sure you'll stick with oil paint I would suggest you buy the best brand you can afford - even though Cadmium Red and Yellow might be very expensive they could last you decades because of how thinly we paint and oils last practically indefinitely in the tube.
Winton is about what you'd expect from a line that costs less: lower pigmentation which equals poorer coverage. It also will have hues (imitation colours) for certain pigments - cadmium, cobalt and chromium - that are expensive. Cheaper oils may also have a tendency to dry glossier because of their higher oil content so soaking out a little excess oil and speed-drying using heat will often be advisable; if you rely on Dullcoat or another good matt overspray you don't need to worry about this aspect.
That said for some things Winton, D-R's Georgian line or similar lower-cost ranges might be worth considering, their earths could be decent (cheap pigment, so they don't have to skimp on it as much) and for pigments like Phthalo Blue GS, Phthalo Green BS and Dioxazine Purple that are very high in tinting strength it will make them a little easier to handle in mixtures.
At the very least I would suggest you buy Titanium White from a top-notch brand, you'll always appreciate the opacity.
Einion
