Sorry guys,
Life got in the way there.
Kowa needed them back, so I have sent them off. I am working on a couple of articles.
I will expand greatly, but here is the spoiler:
1. The SV series 12X50 is similar to many budget high-mag bins. OK resolution and contrast. Plenty of CA even in the center. Lightweight, less robust build quality.
2. The Prominar bins are big, heavy, and have a very good image. The design is hampered by a lack of tripod exit.
3. The spotter:
The Prominar 88 with the 25-60 WA provides the best image I have seen in a spotter. Extermely high resolution, awesome aberration correction (particluarly AMAZING CA correction!). However, when price is no option, I would choose the ATX over the Prominar. The ATX has equal resolution, and an "easier" viewing eyepiece. The ATX shows more CA than the Prominar, but it isn't excessive, and the other design features of the ATX make up for it, IMO.