i'm thinking when we talk about best 11 that probably means the team we'd play against our toughest opposition - if that is the case then i imagine Rafa would go with a 4-2-3-1 formation with something like the following
Reina
Finnan Carra Hyypia Aurelio
Sissoko Alonso
Pennant Gerrard Gonzalez
Bellamy
subs: Carson, Agger, Riise, Fowler, Garcia
i think that'd be the most versatile 11 +subs bench we would have available for our toughest ties
outside of our toughest matches i'm not sure best 11 is something rafa will worry about as there is plenty of quality available to swap the above 16 - Dudek, Kromkamp, Pauletta, Warnock, Kewell, Crouch, Anderson, Zenden, Flo - all of them should be able to do a job when called upon - that being the case we may not see our 'best' 11 for much more than a handful of game this season i reckon