eaglemountainman
WKR
I'm pretty sure you mean the Prominar Series 553/554 instead of the lesser 501/502 series.It's near impossible to go "wrong" with those 500 series spotters.
But, OP you seem to have gotten something you are satisfied with.
Find a good bino that better fits what you are planning to do and you're set. With what you have, 8x seems to make the most sense but 10x would certainly work.