I had the sporter model (B1) for a couple of years and liked it well enough. The gun was quite accurate, built like a tank (much beefier than your old .303), and unfortunately much too heavy for my taste. If I had gotten the B2 Match model about which you are asking, I would probably still own it for range use, but as a hunting gun the B1 just didn't quite work for me.
Many of these AIA guns that I have seen are equipped with nicely matching buttstocks and fore-ends. Others, like mine, have beautifully grained and coloured wood in one piece, and a plane piece of lumber in the other piece that spoils the appearance.