Id try some if you can or have friends with them.The Kowa is a nice little scope,but they are specific and harder to use ,small field of view etc. My old 1/2 price Leupold 15-45x60 I prefer over my Kowa.Mines going up for sale after Sunday
I think The KOWA 663 Prominar is the best compromise, its light enough but has enough weight to be manageable and has plenty of power and objective size.