Hmmm, I see lots and lots of E11's and don't think they have much character (sometimes a good thing though)
They are technically good enough for any player up to around diploma level IMO BUT swap the mouthpiece!
E13s are also good instruments and I think they offer a little more but not necessarily more than your E11, wooden clarinets especially are all very different.
Remember there are many more marques than Buffet out there! Try many
You may find you love anything from a technologically advanced Hanson pro model to a Buffet 1930s Pre-R13! Just remember some of the older instruments can have "suspect" tuning issues and if you play with others a lot in bands and need to blend in a more "standard" instrument could be better.