Neither of them need a loan, I doubt AOC would be pleased at the prospect either given that he's been played every game since Janurary and now starting for England. I think Chamberlain is the type that comes on leaps and bounds anyway, like Koscielny.
Ramsey needs some time out of the firing line and play as a squad player, I doubt he'll mind.
What we really need is Wilshere to get back to his best quickly.
I think Podolski will be a good buy and Giourd will undoubtedly be an improvement on Chamakh and Park. We've gone in for two of the most in form strikers around in 11/12, aside from the obvious candidates. That's some serious goal threat.