I have a few nice leupold scopes and only 1 nice bushnell - E6500 4.5-30. The bushnell has decent glass, but has huge reticle lines and suffers from a bit of pincushion near the edges. The Leupolds (VX3, MK4 and VXR all have nice glass and no visible aberrations period. Hell the VX2 I have has nice glass too.
I would humbly recommend Leupold if your budget will swing it. Only reason I bought the Bushnell was I wanted something with higher mag and it was on sale, on a no tax day, with my 10% off card and had a bushnell mail in rebate plus jacket offer. In the end I'm really not happy with it and will eventually replace it with a Sightron for higher mag for long distance.