How to choose walking shoes?

Hi everyone!

I went on my first meetup this week with a hiking/walking group. We did 5 miles on a rail trail that covers pavement, nature trail, and gravel. I did fine except that the ball of my right foot got a terrible hot spot at about the 4 mile mark, and I got a blister. I know I need new shoes (these are well over 1.5 yrs old), but I'm not sure how to choose.

My criteria -

Lightweight! I hate heavy shoes
Breatheable - I hate hot shoes
Under $75 ( I know, that makes it harder, but that limit is really pushing my budget. It should be under $50)

I walk both on pavement and on trails, so I would like something that can do both. I don't tend to do strenuous hiking, and have a boot for that anyway.

I have always chosen running shoes to walk in, because I like the lightness and flexibility. But since I never run, this is probably not a good choice.

So how do I choose?

I've tried on Merrell Siren Sport, but did not like the hard sole. I tried on Merrell Payette (apparently only available at D i c k s Sporting Goods and Gander MTN, but if anyone knows of a different place please share!) and the 10s are just a tiny bit too small in the length, and they don't seem to carry 10.5 or 11. But they have a flexible sole and are cushiony. New Balance has always been my brand of choice before, but I'm willing to explore.

Any advice on choosing walking shoes would be greatly appreciated!

Replies