According to both the Telegraph and the Mirror, Gonzalo Higuain has agreed to personal terms of a salary of £130,000 per week as Arsenal look to seal the 25 year old's transfer. That Wenger has spoken several times with Higuain, and his agent, his father Jorge, is supposed to be an important factor in the Argentinian's desire to move to the Emirates, as is the probability of Higuain being Arsenal's first choice striker.
That the news comes in two newspapers means it has probably been leaked by the club's press office, and can be thought of as reliable information, rather than Loud Noises coming from someone's mate's brother's boss's tea lady who works with Ivan Gazidis' gardner. In any event, both papers say that Arsenal must finalise the deal with Real Madrid, who have reportedly said that Higuain will not yet move until a manager, thought to be Carlo Ancelotti, is appointed. Either way, it seems that Higuain does want to leave the Bernabeu, as indicated by agreeing personal terms with Arsenal, and as long as the two clubs come to an agreement, Higuain should be at the Emirates come August.
Arsenal are thought to be offering £22m, slightly less than Real want, but given that Juventus have seemingly switched attention to Stevan Jovetic, Higuain has agreed personal terms, and that Arsenal can pay in fewer installments, the deal should be concluded fairly quickly, as long as Arsenal act quickly. It's not done yet, but it's looking increasingly likely.