I sold my Swaro STM65 and bought a Kowa 55mm spotter. I have not regretted it yet, it is awesome glass at 28oz with it's Outdoorsmans adapter. It does not have the field of view that the bigger spotter did but the clarity is excellent and low light performance is better than expected. I also have a Swaro ATS80 HD spotter for use when weight isn't a factor, but when it is I'll take the Kowa.
I got mine from S&S archery with a discount code for a price I felt was reasonable for what it is.
I primarily use a spotter for evaluating game I already found with binos. I love binos off a tripod and will pack 15x Swaros a lot when I feel like I want more than my 10x. I have a hard time going back to trying to locate game with the spotter after putting time behind the 15x binos, I just feel like I'm more effective. That may be part of the reason I don't mind the smaller field of view of the Kowa 55. Going lighter the 10x Leicas and 55mm Kowa spotter darn near always go with or without the 15x. I would consider going to a 12x50 bino and getting rid of my 10x and 15x binos if Leica or Swaro made one with a good rangefinder and excellent glass. I hope someday they do!