Spotters are great for counting rings on rams. 12 or 15 power binos are better/easier on your eyes during long sessions than a spotter. These work really well for counting points on an elk.
I have an 80mm spotter and 12 power binos that I used together. I find myself leaning towards using only my 12 power binos than my spotter since the magnification is very good, a notable weight difference (28 oz for bino versus 68 oz for spotter), and the field of view at 1,000 yards is much larger on my 12 power (251 feet at 1,000 yards).
For my 80mm spotter with 27 -50 power magnification has an FOV of 105 - 73 feet respectively. Weight 68 oz.
If you already use a tripod for your 10 power binos, then I would consider getting 15 power bino's instead of a spotter. For example, Leupold's 15 power's weigh 45 oz, have a 231 ft FOV at 1,000 yards.
(edited to include specifics)