The thing is with Napoli, there squad is set up so accurately that it's easy for a player like Cavani to be part of them. Not only are they a growing challenge in Serie A, they're also the club that gave Cavani a real chance. Napoli in a season or 2 could easily go on to win the Italian league and every season they can look stronger in progressing in the Champions League. They have an array of stars from Maggio to Inler to the deadly front 3 of Cavani, Lavezzi & Hamsik. While you could argue Napoli aren't a "big club" per se, they're definitely on the way of becoming on. They're signing future stars like Inler & Vargas so they're always progressing. Unlike Borussia Dortmund (who you could argue are the German equivalents) they don't look like a selling club, unless a heavy offer comes in. So considering we did spend £50m on Torres, Cavani would cost around the same. He's young, his contract isn't running out any time soon and he's on hot form for Napoli. He doesn't seem like he'd put in a transfer request either.