Screen DigestThe Californian electronics research house plans to buy the London-based media analyst before the end of 2010. It looks like a good fit for iSuppli, whose specialty is number crunching sales of set-top boxes, how much it costs to build an iPad, that kind of thing. Goldman Sachs invested in iSuppli in 2007. Screen Digest has been tracking media markets since 1971, covering movies, TV and home entertainment. The London-based research firm has been up for sale for more than a year. Rival media research house Informa kicked the tyres before walking away – it thought it would end up cannibalising its own business. Having a US boss is going to provide some much needed balance when it comes to covering North America, says one observer, who claims the company’s been much too focused on Europe.