For boots, most important is how well they fit. Only way to know is try on a bunch.
Best thing I ever bought for back country gear (although, would not really consider 2-3 miles back country
) was a Exped Downmat sleeping pad. I had the Downmat 9. OMG what luxury!!!!
http://www.exped.com/usa/en/product-category/mats
After having one, would gladly pay 10X the price they cost!
Best other products I had were:
Handpresso: hand pump espresso maker
http://offpistemag.com/backcountry-e...ndpresso-wild/
And a lightweight hammock for chilling during the day, drinking wine (in Tetra boxes of course!)
http://www.cleverhiker.com/best-backpacking-hammocks/