We've had our 2 yr old for about 6 months and we feed her Felix As Hood As It Gets pouches and Purina One, entirely because that's what the CPL were feeding her.
There seems to be a huge range in price which I've assumed correlates to quality. I recently had to substitute the Purina for the much cheaper IAMS as I couldn't find Purina. The cat is perfectly happy with it.
Price isn't a huge issue. I'm happy to pay for quality but don't want to waste money either. Is it possible to rank the easily available brands in terms of quality?