It's really a matter of preference. I love my Razor HD spotter. The optics quality is great, but definitely not the best (have compared it side-by-side to multiple Kowa 800 series). I still prefer my Premier Heritage scopes to anything else that's available, as far as quality and overall features go. For red dot scopes, I'm partial to Aimpoint. The Vortex Viper PST 1-4x is top of the list for the service rifle I'll eventually get around to building... unless something better comes out before that.