The commercial bonus would be far superior if we got someone like Jovetic, Suarez, or Gotze. Not everyone that supports Juve is Italian, and he's not even the best Italian striker/forward out there. Cassano and Balotelli are far superior to Rossi, and I honestly don't see him as too great of an upgrade over someone like Quag, and I'm being objective here. He's better than all our attackers (which let's face it, isn't really hard to be) bar Vucinic, and I don't want him being our key/marquee signing. He just isn't that good. If we absolutely have to get him, anything over 15 Million Euros is a waste of money.
Furthermore, I'd rather get a young and exciting prospect, in addition to Suarez/Jovetic, and forget about Rossi altogether. Once we are in the CL, we can buy one star player for 2-3 summers, until we finally complete the squad.