Tough call... Kind of depends on what you want to accomplish and what you're willing to do to get there; Spend a little more time (hets) or spend a little more money (Hypos).
It would take you a minimum of 2 years before you saw any Hypos out of a pair of hets. In the mean time, you get to enjoy the "normals" but if it's a Hypo you REALLY want, what is a few hundred dollars divided up over two years?
IMO, you can't go wrong either way...