  This paper is devoted to the study of existence and properties of solitary
waves of the Benjamin equation. The studied equation includes a parameter
$\gamma$ in front of the Benjamin-Ono term. We show the existence, uniqueness,
decay and orbital stability of solitary wave solutions obtained as a solution
to a certain minimization problem, associated either with high speeds without a
sign condition on the parameter $\gamma$ or with low speeds for the appropriate
sign.
