For as long as the Playstation 3 and Xbox 360 have been on the market together, debate has raged over which online service, Xbox Live or the Playstation Network, is better value for gamers. Although many people argue that Xbox Live Gold’s service is a superior offering, many others feel that its advantages are offset by the fact that it usually costs about $50/year, while Sony’s PSN is free. Well now, fanboy arguments are going to get unusually complex and nuanced, as Sony are set to launch Playstation Plus, a so-called ‘premium service’ that will exist atop the existing Playstation Network and…