  Let $X$ be an infinite compact metric space with finite covering dimension
and let $\alpha, \beta : X\to X$ be two minimal homeomorphisms. We prove that
the crossed product $C^*$-algebras $C(X)\rtimes_\alpha\Z$ and
$C(X)\rtimes_\belta\Z$ are isomorphic if and only if they have isomorphic
Elliott invariant. In a more general setting, we show that if $X$ is an
infinite compact metric space and if $\alpha: X\to X$ is a minimal
homeomorphism such that $(X, \alpha)$ has mean dimension zero, then the tensor
product of the crossed product with a UHF-algebra of infinite type has
generalized tracial rank at most one. This implies that the crossed product is
in a classifiable class of amenable simple $C^*$-algebras.
