They're a good vane. Shooting mechanicals you will likely be just fine. Were you to move to fixed blade BHs, I think you would want to move to the full sized Sabres, or the new Iron Will vanes.
What is the hunting conditions you'll be using them in? What mechanicals?
The reason I ask is some mechanicals have a lot of exposed blade that doesn't make them that much better in flight than a small vented fixed. If you're shooting close then you can get about anything to work. I lean towards more vane control almost always as you're not gaining anything tangible with the small vane unless it's incredibly windy like in the plains. Which should definitely be a consideration if that's the case.
For western hunts that might get longer shots and windy - a small 3 fletch with a mechanical that has little surface area is a really good option.