[Haskell-cafe] Looking for reliable heterogeneous vectors

Hello, everyone. I'm looking for reliable library or idea how to implement heterogenous vector properly. It may seem odd, but I want elements not only be different types but also functions, something like that, pseudocode: hvec [a b (c->d) [a] ...] -- can be any type let hvec = hvec [ "stuff" 5 getUrl [1, 4, 5]] So far I found *vector-heterogenous* package, but can't decide is it good to build on or create something on my own. Any thoughts and ideas are appreciated. Thanks.