yeah i'd agree I worked for WHSmith at the time, we got 20 cubes in and only had 2 preorders (1 was me!) so definitely recommend trying them, having said they have downsized their gaming buying now, so may not have quite as many now.
Anyhow, got 2 preorders now for me, my one at work HMV (owing to moving branches though didn't preorder till orders were in 30's) and my amazon one, gonna just get amazon one now, and get games on discount from work.