  We investigate models of supersymmetric grand unification based on the gauge
group SU(5). We consider models with non-universal gaugino masses and confront
them with low energy constraints, including the Higgs boson mass and the Dark
Matter relic density. We also discuss fine-tuning and show the effect of not
including the mu-parameter into fine tuning determinations. With this
relaxation, we find viable scenarios with low fine tuning and study some model
choices for gaugino mass ratios. We demonstrate that some orbifold inspired
models may provide low fine-tuning and the preferred relic abundance of Dark
Matter while evading all experimental constraints. We present benchmarks that
should be explored at the LHC and future colliders.
