I'm happy with Robin, but if you mean as his back-up, not sure to be honest. What I do know is Rossi will cost £30M+, and I don't think he's even close to being worth it, and as I said above, for me, he doesn't suit our system either.
We're not going to get Benzema, or anyone that expensive, as back-up to Robin. It's not going to happen. If you can think of someone similar-ish to Robin, who's happy to sit on the bench, and won't cost the earth - then I'm all for it.