I've got the Maven S1S and am very happy with the clarity and brightness. It is my first spotter, so I'm not comparing to another spotter, but compared to my 18x56 binos, the extra zoom is great.
I do dream on getting a BTX to use both eyes, but wonder if it's worth double.
I'm fairly new to glassing on a tripod, started about a year ago. The tripod makes a huge difference, even with 8x or 10x binos. You'll pick up movement and even animals that aren't moving much better with stable binos vs shaky binos. Plus much less eye fatigue looking through stable binos...