If your going to be glassing under 1000yrds a 30 or 32mm 2willdo you just finefine..
In fact the cheeper cost of going to a compact will allow you to upgrade
in bino quality without going over your budget....
I'd personally go with 8 power its gives you a bigger field of view, theoretically could be brighter, andshould theoretically give you a bigger exit pupil ,and theoretically should be brighter than the 10x mag, but that all depends on your eyes, and proper lens alignment, coatings etc.
which falls in to the category of overall quality..