I believe you don't need to go to all these fancy restaurants just to have to best food. Being Asian myself, I have tried lots of different places.
One place I suggest for Vietnamese food is Banh Mi Bay, extremely reasonable prices. Pho roughly £6-7, £4 banh mi - perfect for lunch. The broth is made with passion and the taste is not too heavy...I was very satisfied. They also have yummy crispy viet spring rolls.... hand made fresh!