"Unless you're going to be mountaineering with crampons, skip the high ankle boots and just get a pair of trail runners."

I agree with this, though I use day hikers rather than trail runners.

http://www.rei.com/product/846670/merrell-siren-sport-2-hiking-shoes-womens

This assumes you're not going to be someplace superwet that would require 100% waterproof shoes.

What are you using them for?

Unless you're going to be mountaineering with crampons, skip the high ankle boots and just get a pair of trail runners. I switched over about 10 years ago and have had no problems, even on multi day / week backpacking trips. I've since made it even better on my feet by trying to go as lightweight as possible, but did a 10 day stint in the high sierras with a somewhat more traditional setup where my pack probably weighed 40-50lbs (or more) to start and had no issues. Though I did use hiking poles as well. But trail runners + hiking poles is definitely my combo of choice.

As for specific shoes - I think the best brand/model for each person varies depending on your feet. But for me I'm looking to get my 5th pair of Vasques (in
over a decade) because each pair have been so good to my feet. Can't remember exactly which shoe I've got, but something like the Velocity:
http://www.vasque.com/vasque-shoe/7555-vasque/7555-vasque-womens-velocity-2.0-bungeecord-sharpgreen

If you want a store, then REI or HTO probably. If you are ok online, then Campmor.

keens. Kind of bulky but very comfortable.

They're not exactly cheap. But go to REI - they have a great selection. If you're hikes aren't too long and you don't hike for days in a row, you'll do fine with low boots (sneaker height).

Please and thank you. I'd prefer not spend a fortune and a store preferably.