I agree with Jon - the Nikon Monarchs, of which I have purchased quite a few from him, are just awesome scopes - very bright, clear, and reliable. The Gold series, which have 30mm main tubes, and the particular scope you are looking at, has 4.0" to 4.1" of eye relief - that's just awesome, especially for a .375H&H.
That said, on my .375H&H I mounted an Elite 3200 1.5x-4.5x with firefly reticle. I normally buy more expensive optics, but the Elite 4200s had less eye relief than this 3200, which has (if I remember correctly) a constant 3.6". Why did I not get a scope with better light transmission? Because, to my way of thinking, I will probably use open sights more than the scope - that's why I got detachable rings. How does the scope perform? PERFECT! Tracking is excellent and the optics are good (not awesome, but good). Plus, the firefly illuminated reticle really works, and it works well.
That said, you just can't go wrong with that particular Nikon Monarch Gold.
Zachary