I would leave the rear single sight. I've never flipped up any of the additional ones. If you need more range add a Leupold VXIII 1.5-5x20, I prefer the German #4 reticle. This scope gives excellent eye relief (a must with the 375H&H

) and looks great on top of a Brno. I have mine mounted on a nice custom (I purchased it from a fellow who had it made) quick detatch, its solid, and holds zero. Its currently on my Brno ZKK 602 in 416 Rigby, but I've had it on my 375 H&H's and its a great scope.

Edit:

Here's a picture of the Leupold on one of my ZKK's, had to wait for my slow internet to upload it.