In order of usefulness I'd go
BBB
Runner's Companion
Arsenal
Street Magic
Unwired
Augmentation
BBB
Runner's Companion
Arsenal
Street Magic
Unwired
Augmentation
Why on *earth* would you put RC first? It's only useful if you want to munch out a character as completely as possible. The vast majority of it only applies to new character creation anyway, so it won't add much to an existing campaign.
As far as the English Arsenal cover goes-- dear gods! The perspective is awful, the ork woman is built like a man with breasts, and her arms are completely wrong.