In my opinion, for movies, the Sony is an excellent amplifier: sound, features, looks, appealing remote - it can't be faulted for the price. It's not so bad with music either, however, I use a NAD C370 in my other system for music listening, so am not really bothered about the Sony's music performance.
The biggest offence in the What Hi-Fi review is the inclusion of the Marantz SR-4300 rather than the better SR-5300 as it is the 5300 which falls into the test price bracket. I find it highly annoying when any magazine performs this kind of incorrect grouping.
On the other hand, owners of the well priced SR-4300 (great deal at RS) can be proud of how well it stood up against the bigger boys. I wonder how the SR-5300 would have done then...
I believe the street price for the Sony of £329 What Hi-Fi were referring to was an ex-VAT price available at Techtronics (don't shop there!).