Nikon Monarch 3's are very good. I have two with BDC and my wife uses a Prostaff with BDC. Have a 6-24x50 Monarch 3 with BDC on a 300 WSM. I don't use the DBC so much though. I dial the scope for long range shooting. The scope dials perfectly. Have shot it with great accuracy out to 867 yards. I have the older Monarchs that came with three sets of dials: short, tall covered, and large knob uncovered. This was a great option they had. Not sure if it is still available with the newer ones. Also, the SpotOn technology works very well, but usually requires fine tuning for each rifles load and elevation.
All that said, they do have their drawbacks. The big one is there is no way to compensate for windage with the BDC reticle, you have to dial for wind just like a regular scope. This is a huge problem if you shoot in the wind. (And I bet in Newfoundland, it can get windy.) It is always better to dial for elevation and hold for wind, Nikon seems to have this backwards. Also, not a big fan of the circles for hash marks on the BDC. The crosshairs are also too heavy for me on the Monarchs. SpotOn definitely does work though.
Have not used a Vortex DBC yet but have a brand new on the shelf that I plan to setup this summer. I like the Vortex BDC better as it has windage marks on the horizontal crosshair that are in 2 MOA. This would allow you to dial for range on long shots and use the MOA references for wind or use the DBC for both range and wind. Kind of the best of both worlds.