I'm looking for a recommendation for a good, solid pair of shoes for my weekly long runs. Presently wearing saucony Pro Guides [?]; I have also worn in the past the Asics Gel-Kayano [too expensive, in my book]; and the Mizuno Wave Nirvana [also very pricey, and they tend to "bottom out" very quickly]. I'm a mild pronator, in my early 50s; 19:45 recent 5K time, with narrow feet. Looking for a sold set of shoes for the long runs, that will hold up and last me half a year. I run roughly 30 miles per week.