I am not convinced he can reach AND stay in top 10 for long period of time. Players such as Ferrer, Berdych, Soderling, Del Potro, Roddick, Tsonga, Monfils, Fish all have more class. Richard showed a glimpse this spring that he can challenge these kind of players, but since RG he has been just a top 20 player. To be solid top 10, he needs to what he did this spring all year long. Starting at RG how many sets has he won against top 10 opposition?
Those players have more something than Richard but it is certainly not more CLASS. Maybe I define class differently than you but in my opinion RIchard is Top 5 in class. Perhaps you mean more tenacious mindset in Ferrer's case, more power in Soderling, Berdych, Del Potro, and Tsonga's case, more speed/athleticism in Monfils' case and more I don't know what in Fish's case (still can't figure out why Fish is doing so well). And what is Roddick doing in there with those guys? Only thing I can think that Roddick has is more, WAAAY more cockiness.
I do agree with you about Richard not being able to stay top 10, I'm not sure he can even get to top 10 at all. But I'm not a fan of Richard's because he wins or because he is top 10, I'm a fan of his because of his total CLASS and the absolute magical tennis he displays occassionally (and he isn't too bad to look at either